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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2020	May 08, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2020
Document Quarterly Report	true
Document Transition Report	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Trading Symbol	RBB
Entity Registrant Name	RBB BANCORP
Entity Central Index Key	0001499422
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Common Stock, Shares Outstanding		19,739,281
Entity Interactive Data Current	Yes
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-38149
Entity Tax Identification Number	27-2776416
Entity Incorporation State Country Code	CA
Entity Address, Address Line One	1055 Wilshire Blvd.
Entity Address, Address Line Two	Suite 1200
Entity Address, City or Town	Los Angeles
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90017
City Area Code	213
Local Phone Number	627-9888
Title of each class	Common Stock, No Par Value
Security Exchange Name	NASDAQ

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 285,667	$ 114,763
Federal funds sold and other cash equivalents	75,300	67,000
Cash and cash equivalents	360,967	181,763
Interest-earning deposits in other financial institutions	600	600
Securities:
Available for sale	126,294	126,069
Held to maturity (fair value of $8,154 and $8,632 at March 31, 2020 and December 31, 2019, respectively)	7,825	8,332
Mortgage loans held for sale	52,096	108,194
Loans held for investment:
Real estate	2,051,767	1,852,206
Commercial and other	353,722	349,391
Total loans	2,405,489	2,201,597
Unaccreted discount on acquired loans	(5,065)	(5,067)
Deferred loan (fees) costs, net	(442)	404
Total loans, net of deferred loan fees	2,399,982	2,196,934
Allowance for loan losses	(20,130)	(18,816)
Net loans	2,379,852	2,178,118
Premises and equipment	24,472	16,813
Federal Home Loan Bank (FHLB) stock	15,630	15,000
Net deferred tax assets		2,326
Other real estate owned (OREO)	293	293
Cash surrender value of life insurance (BOLI)	34,544	34,353
Goodwill	69,790	58,563
Servicing assets	16,826	17,083
Core deposit intangibles	6,234	6,100
Accrued interest and other assets	33,230	34,928
Total assets	3,128,653	2,788,535
Deposits:
Noninterest-bearing demand	504,324	458,763
Savings, NOW and money market accounts	571,870	537,490
Time deposits under $100,000	245,827	257,362
Time deposits $100,000 and over	1,113,960	995,323
Total deposits	2,435,981	2,248,938
Reserve for unfunded commitments	979	826
Net deferred tax liabilities	312
FHLB advances	150,000	0
Long-term debt, net of debt issuance costs	104,135	104,049
Subordinated debentures	14,120	9,673
Accrued interest and other liabilities	15,133	17,359
Total liabilities	2,720,660	2,380,845
Commitments and contingencies - Note 13
Shareholders' equity:
Preferred Stock - 100,000,000 shares authorized, no par value; none outstanding
Common Stock - 100,000,000 shares authorized, no par value; 19,739,280 shares issued and outstanding at March 31, 2020 and 20,030,866 shares at December 31, 2019	286,350	290,395
Additional paid-in capital	4,833	4,938
Retained earnings	116,149	112,046
Non-controlling interest	72	72
Accumulated other comprehensive income, net	589	239
Total shareholders’ equity	407,993	407,690
Total liabilities and shareholders’ equity	$ 3,128,653	$ 2,788,535

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Securities held to maturity, fair value	$ 8,154	$ 8,632
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, par value
Preferred stock, shares outstanding	0	0
Common stock, shares authorized	100,000,000	100,000,000
Common stock, par value
Common stock, shares issued	19,739,280	20,030,866
Common stock, shares outstanding	19,739,280	20,030,866

CONSOLIDATED STATEMENTS OF INCOME - (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest and dividend income:
Interest and fees on loans	$ 32,276	$ 35,839
Interest on interest-earning deposits	451	468
Interest on investment securities	821	588
Dividend income on FHLB stock	2	198
Interest on federal funds sold and other	478	113
Total interest income	34,028	37,206
Interest expense:
Interest on savings deposits, now and money market accounts	1,243	1,294
Interest on time deposits	7,086	5,953
Interest on subordinated debentures and long-term debt	1,956	1,933
Interest on other borrowed funds	150	2,114
Total interest expense	10,435	11,294
Net interest income	23,593	25,912
Provision for loan losses	1,945	550
Net interest income after provision for loan losses	21,648	25,362
Noninterest income:
Service charges, fees and other	1,079	820
Gain on sale of loans	2,711	2,198
Loan servicing fees, net of amortization	592	840
Recoveries on loans acquired in business combinations	42	6
Unrealized gain on equity investments		147
Increase in cash surrender value of life insurance	191	191
Total noninterest income	4,615	4,202
Noninterest expense:
Salaries and employee benefits	9,505	9,118
Occupancy and equipment expenses	2,404	2,252
Data processing	1,142	1,009
Legal and professional	604	425
Office expenses	323	336
Marketing and business promotion	214	362
Insurance and regulatory assessments	177	298
Core deposit premium	357	388
OREO expenses	14	81
Merger and conversion expenses	403	71
Other expenses	1,120	985
Total noninterest expense	16,263	15,325
Income before income taxes	10,000	14,239
Income tax expense	3,252	3,859
Net income	$ 6,748	$ 10,380
Net income per share
Basic	$ 0.34	$ 0.52
Diluted	0.33	0.51
Cash dividends declared per common share	$ 0.12	$ 0.10

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 6,748	$ 10,380
Other comprehensive income:
Unrealized gains on securities available for sale, Change in unrealized gains	498	958
Unrealized gains on securities available for sale	498	958
Related income tax effect, Change in unrealized gains	(148)	(284)
Related income tax effect	(148)	(284)
Total other comprehensive income	350	674
Total comprehensive income	$ 7,098	$ 11,054

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Non-Controlling Interest	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2018	$ 374,621	$ 288,610	$ 5,659	$ 81,618	$ 72	$ (1,338)
Beginning balance, shares at Dec. 31, 2018		20,000,022
Net income	10,380			10,380
Stock-based compensation	231		231
Cash dividend	(2,007)			(2,007)
Stock options exercised, net of expense recognized	904	$ 1,303	(399)
Stock options exercised, net of expense recognized, shares		73,969
Other comprehensive income, net of taxes	674					674
Ending balance at Mar. 31, 2019	384,803	$ 289,913	5,491	89,991	72	(664)
Ending balance, shares at Mar. 31, 2019		20,073,991
Beginning balance at Dec. 31, 2018	$ 374,621	$ 288,610	5,659	81,618	72	(1,338)
Beginning balance, shares at Dec. 31, 2018		20,000,022
Stock options exercised, net of expense recognized, shares	200,629
Ending balance at Dec. 31, 2019	$ 407,690	$ 290,395	4,938	112,046	72	239
Ending balance, shares at Dec. 31, 2019	20,030,866	20,030,866
Net income	$ 6,748			6,748
Stock-based compensation	161		161
Cash dividend	(2,414)			(2,414)
Stock options exercised, net of expense recognized	$ 712	$ 978	(266)
Stock options exercised, net of expense recognized, shares	56,498	56,498
Repurchase of common stock	$ (5,254)	$ (5,023)		(231)
Repurchase of common stock, shares		(348,084)
Other comprehensive income, net of taxes	350					350
Ending balance at Mar. 31, 2020	$ 407,993	$ 286,350	$ 4,833	$ 116,149	$ 72	$ 589
Ending balance, shares at Mar. 31, 2020	19,739,280	19,739,280

CONSOLIDATED STATEMENTS OF CASH FLOWS - (UNAUDITED) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Operating activities
Net income	$ 6,748,000	$ 10,380,000
Adjustments to reconcile net income to net cash from Operating activities:
Depreciation and amortization of premises, and equipment	522,000	481,000
Net accretion of securities, loans, deposits, and other	(873,000)	(964,000)
Unrealized gain on equity securities		(147,000)
Amortization of investment in affordable housing tax credits	247,000	225,000
Amortization of intangible assets	1,441,000	1,187,000
Provision for loan losses	1,945,000	550,000	$ 2,390,000
Stock-based compensation	161,000	231,000
Deferred tax benefit (expense)	1,503,000	(31,000)
Gain on sale of loans	(2,711,000)	(2,198,000)
Increase in cash surrender value of life insurance	(191,000)	(191,000)
Loans originated and purchased for sale	(30,423,000)	(41,348,000)
Proceeds from loans sold	104,273,000	144,272,000
Other items	(4,442,000)	(663,000)
Net cash provided by operating activities	78,200,000	111,784,000
Investing activities
Increase in interest-earning deposits		(596,000)
Securities available for sale:
Purchases	(151,163,000)
Maturities, prepayments and calls	151,707,000	16,185,000
Securities held to maturity:
Maturities, prepayments and calls	500,000	500,000
Redemption of Federal Home Loan Bank stock		1,751,000
Purchase of Federal Home Loan Bank stock and other equity securities, net	(621,000)	(1,007,000)
Purchase of investment in qualified affordable housing projects	(2,004,000)
Net increase in loans	(45,668,000)	(20,438,000)
Net cash received in connection with acquisition	6,634,000
Purchases of premises and equipment	(135,000)	(484,000)
Net cash used in investing activities	(40,750,000)	(4,089,000)
Financing activities
Net decrease in demand deposits and savings accounts	(108,420,000)	(118,098,000)
Net increase in time deposits	107,130,000	158,400,000
Net decrease in short-term FHLB advances		(44,500,000)
Net increase in long-term FHLB advances	150,000,000
Cash dividends paid	(2,414,000)	(2,007,000)
Common stock repurchased, net of repurchased costs	(5,254,000)
Exercise of stock options	712,000	904,000	2,800,000
Net cash provided by (used in) financing activities	141,754,000	(5,301,000)
Net increase in cash and cash equivalents	179,204,000	102,394,000
Cash and cash equivalents at beginning of period	181,763,000	147,685,000	147,685,000
Cash and cash equivalents at end of period	360,967,000	250,079,000	$ 181,763,000
Cash paid during the period:
Interest paid	8,643,000	2,350,000
Non-cash investing and financing activities:
Transfer from loans to other real estate owned		955,000
Transfer of loans to held for sale, net	15,041,000	33,633,000
Loan to facilitate OREO	1,025,000	412,000
Net change in unrealized holding gain on securities available for sale	350,000	$ 674,000
Additions to servicing assets	827,000
Acquisition:
Assets acquired, net of cash received	183,524,000
Liabilities assumed	201,385,000
Cash considerations	32,885,000
Goodwill	$ 11,227,000

Business Description

3 Months Ended

Mar. 31, 2020

Business Description [Abstract]

Business Description

NOTE 1 - BUSINESS DESCRIPTION

RBB Bancorp (“RBB”) is a financial holding company registered under the Bank Holding Company Act of 1956, as amended. RBB Bancorp’s principal business is to serve as the holding company for its wholly-owned banking subsidiaries, Royal Business Bank ("Bank") and RBB Asset Management Company ("RAM"), collectively referred to herein as "the Company". RAM was formed to hold and manage problem assets acquired in business combinations.

At March 31, 2020, the Company had total consolidated assets of $3.1 billion, gross consolidated loans (held for investment and held for sale) of $2.5 billion, total consolidated deposits of $2.4 billion and total consolidated stockholders' equity of $408.0 million. RBB’s common stock trades on the Nasdaq Global Select Market under the symbol “RBB”.

The Bank provides business banking services to the Chinese-American communities in Los Angeles County, Orange County, Ventura County, Las Vegas, the New York City metropolitan area and the Chicago metropolitan area, including remote deposit, E-banking, mobile banking, commercial and investor real estate loans, business loans and lines of credit, Small Business Administration (“SBA”) 7A and 504 loans, mortgage loans, trade finance and a full range of depository accounts.

The Company operates full-service banking offices in Arcadia, Cerritos, Diamond Bar, Irvine, Los Angeles, Monterey Park, Oxnard, Rowland Heights, San Gabriel, Silver Lake, Torrance, West Los Angeles, and Westlake Village, California; Las Vegas, Nevada; Manhattan, Brooklyn, Flushing, and Elmhurst, New York; and the Bridgeport and Chinatown areas of Chicago, Illinois. The Company’s primary source of revenue is providing loans to customers, who are predominantly small and middle-market businesses and individuals.

The Company generates its revenue primarily from interest received on loans and leases and, to a lesser extent, from interest received on investment securities. The Company also derives income from noninterest sources, such as fees received in connection with various lending and deposit services, residential mortgage loan originations, loan servicing, gain on sales of loans and wealth management services. The Company’s principal expenses include interest expense on deposits and subordinated debentures, and operating expenses, such as salaries and employee benefits, occupancy and equipment, data processing, and income tax expense.

The Company has completed six acquisitions from July 8, 2011 through March 31, 2020, including the acquisition of PGB Holdings Inc. (“PGBH”) and its wholly-owned subsidiary, Pacific Global Bank (“PGB”), which closed on January 10, 2020. PGB operated three branches in Chicago. See Note 3 – Acquisition, for more information about the PGBH acquisition transaction. All of the Company’s acquisitions have been accounted for using the acquisition method of accounting and, accordingly, the operating results of the acquired entities have been included in the consolidated financial statements from their respective acquisition dates.

Basis of Presentation and Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Basis of Presentation and Summary of Significant Accounting Policies

NOTE 2 - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The accompanying unaudited consolidated financial statements and notes thereto of the Company have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”) for Form 10-Q and conform to practices within the banking industry and include all of the information and disclosures required by accounting principles generally accepted in the United States of America (“GAAP”) for interim financial reporting. The accompanying unaudited consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments), which are necessary for a fair presentation of financial results for the interim periods presented. The results of operations for the three months ended March 31, 2020 are not necessarily indicative of the results for the full year. These interim unaudited financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto as of and for the year ended December 31, 2019, included in our Annual Report filed on Form 10-K for the fiscal year ended December 31, 2019 (our “2019 Annual Report”).

Use of Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. It is reasonably possible our estimate of the allowance for loan losses and the fair value of mortgage servicing rights could change as actual results could differ from those estimates. Actual results could differ from those estimates.

Summary of Significant Accounting Policies

The accompanying unaudited consolidated financial statements were compiled in accordance with the accounting policies set forth in Note 2 – Basis of Presentation and Summary of Significant Policies in our Consolidated Financial Statements as of and for the year ended December 31, 2019, included in our 2019 Annual Report. The accompanying consolidated unaudited financial statements reflect all adjustments consisting of normal recurring adjustments that, in the opinion of management, are necessary to reflect a fair statement of our consolidated financial condition, results of operations, and cash flows. The results of operations for acquired companies are included from the dates of acquisition. Operating results for the three months ended March 31, 2020 are not necessarily indicative of the results that may be expected for the year ended December 31, 2020. The Financial Accounting Standards Board ("FASB") issues Accounting Standards Updates ("ASU" or “Update”) and Accounting Standards Codifications (“ASC”), which are the primary source of GAAP.

Recent Accounting Pronouncements

When RBB conducted its initial public offering (“IPO”) in 2017, we qualified as an emerging growth company (“EGC”). We will remain an EGC until the earliest of (i) the end of the fiscal year during which we have total annual gross revenues of $1.0 billion or more, (ii) the end of the fiscal year following the fifth anniversary of the completion of our IPO, (iii) the date on which we have, during the previous three-year period, issued more than $1.0 billion in non-convertible debt and (iv) the date on which we are deemed to be a “large accelerated filer” under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). We anticipate no longer qualifying as an EGC on January 1, 2023. EGCs are entitled to reduced regulatory and reporting requirements under the Securities Act of 1933, as amended (the “Securities Act”), and the Exchange Act.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). This Update requires an entity to recognize revenue as performance obligations are met, in order to reflect the transfer of promised goods or services to customers in an amount that reflects the consideration the entity is entitled to receive for those goods or services. The following steps are applied in the updated guidance: (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when, or as, the entity satisfies a performance obligation. These amendments are effective for public business entities for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Our revenue is primarily comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income. Accordingly, the majority of the Company’s revenues will not be affected. In addition, the standard does not materially impact the timing or measurement of the Company’s revenue recognition as it is consistent with the Company’s existing accounting for contracts within the scope of the standard. As an EGC, the Company adopted ASU 2014-09 as of January 1, 2019, utilizing the modified prospective approach. The adoption of this ASU did not have a material impact on the Company’s consolidated financial statements, as substantially all of the Company’s revenues are excluded from the scope of the new standard. Since there was no net income impact upon adoption of this ASU, a cumulative effect adjustment to opening retained earnings was not deemed necessary. See Note 20 (Revenue from Contracts with Customers) for more information.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), including subsequent amending ASUs. The most significant change for lessees is the requirement under the new guidance to recognize right-of-use assets and lease liabilities for all leases not considered short-term leases, which is generally defined as a lease term of less than 12 months. This change will result in lessees recognizing right-of-use assets and lease liabilities for most leases currently accounted for as operating leases under current lease accounting guidance. On July 17, 2019, the FASB proposed a one-year deferral of the amendments in this Update to be effective for interim periods beginning after December 15, 2021 and annual periods beginning after December 15, 2020, for an EGC. The Company has several lease agreements which are currently considered operating leases and are therefore not included on the Company’s Consolidated Balance Sheets. Under the new guidance the Company expects that some of the lease agreements will be recognized on the Consolidated Balance Sheets as a right-of-use asset with a corresponding lease liability. Based upon a preliminary evaluation, the Company expects that the ASU will have an impact on the Company’s Consolidated Balance Sheets. As of this Quarterly Report and the Company’s current leases, we estimate the right-of-use asset and lease liability will be in the range of $25-30 million as of the expected January 1, 2021 adoption date. The effective date for this ASU is for years beginning after December 15, 2020, and for interim periods beginning after December 15, 2021. The Company will continue to evaluate how extensive the impact will be under the ASU on the Company’s consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instrument (Topic 326), including subsequent amending ASUs. This ASU significantly changes how entities will measure credit losses for most financial assets and certain other instruments that aren't measured at fair value through net income. The standard will replace today's "incurred loss" approach with an "expected loss" model. The new model, referred to as the current expected credit loss ("CECL") model, will apply to: (1) financial assets subject to credit losses and measured at amortized cost, and (2) certain off-balance sheet credit exposures. This includes, but is not limited to, loans, leases, held to maturity securities, loan commitments, and financial guarantees. For available for sale (“AFS”) debt securities with unrealized losses, entities will measure credit losses in a manner similar to what they do today, except that the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. ASU 2016-13 also expands the disclosure requirements regarding an entity's assumptions, models, and methods for estimating the allowance for loan and lease losses. In addition, public business entities will need to disclose the amortized cost balance for each class of financial asset by credit quality indicator, disaggregated by the year of origination. ASU 2016-13 was originally proposed to be effective for interim and annual reporting periods for an emerging growth company beginning after December 15, 2020 (however, see below). Entities will apply the standard's provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective (i.e., modified retrospective approach). The Company has begun its evaluation of the impact of the implementation of ASU 2016-13. The implementation of the provisions of ASU 2016-13 will most likely impact the Company’s consolidated financial statements as to the level of reserves that will be required for credit losses. The Company will continue to assess the potential impact that this Update will have on the Company’s consolidated financial statements. In October 2019, the FASB announced a delay in the effective date to January 1, 2023 for an EGC. The Company anticipates adopting this ASU 2016-13 on that date.

In February 2019, the U.S. federal bank regulatory agencies approved a final rule modifying their regulatory capital rules and providing an option to phase in over a three year period the day-one adverse regulatory capital effects of ASU 2016-13. Additionally, in March 2020, the U.S. federal bank regulatory agencies issued an interim final rule that provides banking organizations an option to delay the estimated CECL impact on regulatory capital for an additional two years for a total transition period of up to five years to provide regulatory relief to banking organizations to better focus on supporting lending to creditworthy households and businesses in light of recent strains on the U.S. economy as a result of the novel coronavirus disease 2019 ("COVID-19") pandemic. As a result, entities will have the option to gradually phase in the full effect of CECL on regulatory capital over a five-year transition period.

In January 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other (Topic 350). This Update simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. The amendments in this Update are required for public business entities and other entities that have goodwill reported in their financial statements and have not elected the private company alternative for the subsequent measurement of goodwill. As a result, under this Update, “an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit.” ASU 2017-04 is effective for annual and any interim impairment tests performed in periods beginning after December 15, 2022 for an EGC. Adoption of ASU 2017-04 is not expected to have a significant impact on the Company’s consolidated financial statements.

In March 2017, the FASB issued ASU 2017-08, Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities, which is intended to enhance “the accounting for the amortization of premiums for purchased callable debt securities.” This Update shortens the amortization period for certain callable debt securities purchased at a premium by requiring that the premium be amortized to the earliest call date. Under current GAAP, entities generally amortize the premium as an adjustment of yield over the contractual life of the instrument. The amendments in this Update affects all entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date (that is, at a premium). The amendment does not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The ASU’s amendments are effective for EGC’s for interim periods after December 15, 2020 and annual periods beginning after December 15, 2019. An entity should apply the amendments in this Update on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Additionally, in the period of adoption, an entity should provide disclosures about a change in accounting principle. The implementation of the provisions of ASU 2017-08 will most likely not have a material impact the Company’s consolidated financial statements. The Company will continue to assess the potential impact that this ASU will have on the Company’s consolidated financial statements.

In June 2018, the FASB issued ASU 2018-07, Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting. The amendments in this Update expand the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. An entity should apply the requirements of Topic 718 to nonemployee awards except for specific guidance on inputs to an option pricing model and the attribution of cost (that is, the period of time over which share-based payment awards vest and the pattern of cost recognition over that period). The amendments specify that Topic 718 applies to all share-based payment transactions in which a grantor acquires goods or services to be used or consumed in a grantor’s own operations by issuing share-based payment awards. The amendments also clarify that Topic 718 does not apply to share-based payments used to effectively provide (1) financing to the issuer or (2) awards granted in conjunction with selling goods or services to customers as part of a contract accounted for under Topic 606, Revenue from Contracts with Customers. For EGCs, the amendments are effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. This Update has the potential to only impact share-based payments to members of the Company’s non-employees. The Company adopted this ASU on January 1, 2020 and this ASU did not have a material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this Update modify the disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement, based on the concepts in the Concepts Statement, including the consideration of costs and benefits. These disclosure requirements were removed from the topic: (1) The amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, (2) the policy for timing of transfers between levels, and (3) the valuation processes for Level 3 fair value measurements. These disclosure requirements were modified: (1) For investments in certain entities that calculate net asset value, an entity is required to disclose the timing of liquidation of an investee’s assets and the date when restrictions from redemption might lapse only if the investee has communicated the timing to the entity or announced the timing publicly, and (2) the amendments clarify that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date. The following disclosure requirements were added: (1) The changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period, (2) the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. For certain unobservable inputs, an entity may disclose other quantitative information (such as the median or arithmetic average) in lieu of the weighted average if the entity determines that other quantitative information would be a more reasonable and rational method to reflect the distribution of unobservable inputs used to develop Level 3 fair value measurements. In addition, the amendments eliminate “at a minimum” from the phrase “an entity shall disclose at a minimum to promote the appropriate exercise of discretion by entities when considering fair value measurement disclosures and to clarify that materiality is an appropriate consideration of entities and their auditors when evaluating disclosure requirements”. The amendments in this Update are effective for EGCs for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. As an EGC, RBB adopted this Update on January 1, 2020 and it did not have a material impact on the Company’s consolidated financial statements.

In August 2018, the FASB issued ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. This Update provides additional guidance to ASU 2015-05, “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement” (CCA), on the accounting for implementation, setup, and other upfront costs (collectively referred to as implementation costs) apply to entities that are a customer in a hosting arrangement. This Update applies to entities that are a customer in a hosting arrangement that is a service contract. Costs for implementation activities in the application development stage are capitalized depending on the nature of the costs, while costs incurred during the preliminary project and post-implementation stages are expensed as the activities are performed. This Update also requires the customer to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement. This Update is effective for an EGC for annual reporting periods beginning after December 15, 2020, and interim periods within annual periods beginning after December 15, 2021. Early adoption of the amendments in this Update is permitted, including adoption in any interim period, for all entities. The amendments in this Update should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. This Update will most likely not have a material impact unless RBB incurs implementation costs for a CCA that is a service contract.

In November 2019, the FASB issued ASU 2019-08, Compensation—Stock Compensation (Topic 718) and Revenue from Contracts with Customers (Topic 606), Codification Improvements—Share-Based Consideration Payable to a Customer. This ASU will affect companies that issue share-based payments (e.g., options or warrants) to their customers. In June 2018, the FASB issued ASU 2018-07 that expanded the scope of Topic 718, Compensation—Stock Compensation, to include share-based payments to non-employees in exchange for goods and services. That ASU substantially aligned the accounting for share-based payments to non-employees and employees. However, it required share-based payments to nonemployee customers to be accounted for under Topic 606, Revenue from Contracts with Customers, as a reduction of revenue, similar to other sales incentives (such as coupons and rebates). While that ASU provided guidance on the income statement classification of payments to customers (as a reduction of revenue), that ASU did not specify when to measure such awards or how to classify awards on the balance sheet (for example as a liability or as equity). To address diversity in these areas, the new guidance requires companies to measure and classify (on the balance sheet) share-based payments to customers by applying the guidance in Topic 718. As a result, the amount recorded as a reduction in revenue would be measured based on the grant-date fair value of the share-based payment. ASU 2019-08 is effective for entities that have not yet adopted the amendments in ASU 2018-07, the amendments in ASU 2019-08 are effective for an EGC in fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. RBB adopted the ASU as of December 31, 2019 and this ASU did not have a material impact on the Company’s financial statements as the Company has not issued share-based payments to non-employees, except for non-employee members of the board of directors.

In March 2020, the FASB issued ASU 2020-04, "Reference Rate Reform (Topic 848), Facilitation of the Effects of Reference Rate Reform on Financial Reporting," which provides temporary optional expedients to ease the financial reporting burdens of the expected market transition from London Interbank Offered Rate (“LIBOR”) to an alternative reference rate such as Secured Overnight Financing Rate (“SOFR”). The guidance was effective upon issuance and generally can be applied through December 31, 2022. Of the Company’s $2.3 billion in total gross loans as of December 31, 2019, approximately 25% have a LIBOR based reference rate. The Company has several LIBOR based debt issues, refer to Notes 9 and 10 of the Company’s consolidated financial statements included in this Form 10-Q. We are currently evaluating this guidance to determine the date of adoption and the impact on the Company.

Acquisition

3 Months Ended

Mar. 31, 2020

Business Combinations [Abstract]

Acquisition

NOTE 3 – ACQUISITION

PGB Holdings, Inc. Acquisition:

On January 10, 2020, the Company acquired all the assets and assumed all the liabilities of PGB Holdings, Inc. (“PGBH” or “PGB”) in exchange for cash of $32.9 million. PGBH operated three branches in the Chicago, Illinois metropolitan area. The Company acquired PGBH to strategically establish a presence in the Chicago area. Goodwill in the amount of $11.2 million was recognized in this acquisition. Goodwill represents the future economic benefits arising from net assets acquired that are not individually identified and separately recognized and is attributable to synergies expected to be derived from the combination of the two entities. Goodwill is not deductible for income tax purposes.

The following table represents the assets acquired and liabilities assumed of PGBH as of January 10, 2020 and the fair value adjustments and amounts recorded by the Company in 2020 under the acquisition method of accounting:

	PGBH			Fair Value			Fair
(dollars in thousands)	Book Value			Adjustments			Value
Assets acquired
Cash and cash equivalents	$	17,033		$	—		$	17,033
Fed funds sold		8,300			—			8,300
Interest-bearing deposits in other financial Institutions		14,186			—			14,186
Loans, gross		172,443			715			173,158
Allowance for loan losses		(2,265	)		2,265			—
Bank premises and equipment		6,394			1,639			8,033
Core deposit premium		—			491			491
Investment in trust		155			—			155
Other assets		1,687			—			1,687
Total assets acquired	$	217,933		$	5,110		$	223,043

Liabilities assumed
Deposits	$	187,393		$	969		$	188,362
Escrow Payable		4,277			—			4,277
Subordinated debentures		5,155			(763	)		4,392
Deferred income taxes		1,016			1,588			2,604
Other liabilities		1,664			86			1,750
Total liabilities assumed		199,505			1,880			201,385
Excess of assets acquired over liabilities assumed		18,428			3,230			21,658
	$	217,933		$	5,110
Cash paid								32,885
Goodwill recognized							$	11,227

The fair values are estimates and are subject to adjustment for up to one year after the merger date.

The Company accounted for these transactions under the acquisition method of accounting in accordance with ASC 805, Business Combinations, which requires purchased assets and liabilities assumed to be recorded at their respective fair values at the date of acquisition.

The loan portfolio of PGBH was recorded at fair value at the date of acquisition with the assistance of third-party valuation. A valuation of PGBH’s loan portfolio was performed as of the acquisition date to assess the fair value of the loan portfolio. The loan portfolio was segmented into two groups; loans with credit deterioration and loans without credit deterioration, and then split further by loan type. The fair value was calculated on an individual loan basis using a discounted cash flow analysis. The discount rate utilized was based on a weighted average cost of capital, considering the cost of equity and cost of debt. Also factored into the fair value estimates were loss rates, recovery period and prepayment rates based on industry standards.

The Company also determined the fair value of the core deposit intangible, securities and deposits with the assistance of third-party valuations.

The core deposit intangible on non-maturing deposits was determined by evaluating the underlying characteristics of the deposit relationships, including customer attrition, deposit interest rates, service charge income, overhead expense and costs of alternative funding. Since the fair value of intangible assets are calculated as if they were stand-alone assets, the presumption is that a hypothetical buyer of the intangible asset would be able to take advantage of potential tax benefits resulting from the asset purchase. The value of the benefit is the present value over the period of the tax benefit, using the discount rate applicable to the asset.

In determining the fair value of certificates of deposit, a discounted cash flow analysis was used, which involved present valuing the contractual payments over the remaining life of the certificates of deposit at market-based interest rates.

For loans acquired from PGBH, the contractual amounts due, expected cash flows to be collected, interest component and fair value as of the respective acquisition dates were as follows:

	PGBH Acquired Loans
Contractual amounts due	$	195,227
Cash flows not expected to be collected		5,176
Expected cash flows		190,051
Interest component of expected cash flows		16,893
Fair value of acquired loans	$	173,158

In accordance with U.S. GAAP, there was no carryover of the allowance for loan losses that had been previously recorded by PGBH.

The operating results of the Company for the three months ended March 31, 2020 include the operating results of PGBH since its acquisition date. The following table presents the net interest and other income, net income and earnings per share as if the acquisition of PGBH was effective as of January 1, 2020. There were no material, nonrecurring adjustments to the pro forma net interest and other income, net income and earnings per share presented below:

	Three Months Ended March 31, 2020		Three Months Ended March 31, 2019
Net interest and other income	$	28,442	$	32,225
Net income		5,582		10,956
Basic earnings per share		0.28		0.55
Diluted earnings per share		0.28		0.54

The initial accounting for the PGBH acquisition is incomplete as of May 11, 2020, as the fair value analysis for income taxes is in process with the third-party consultant.

Third-party acquisition related expenses are recognized as incurred and continue until the acquired system is converted and operational functions become fully integrated. The Company incurred third-party acquisition related expenses in the consolidated statements of income for the periods indicated in the Statements of Income in the expense item “Merger and conversion expenses”.

Investment Securities

3 Months Ended

Mar. 31, 2020

Investments Debt And Equity Securities [Abstract]

Investment Securities

NOTE 4 - INVESTMENT SECURITIES

The following table summarizes the amortized cost and fair value of available for sale (“AFS”) securities and held to maturity (“HTM”) securities March 31, 2020 and December 31, 2019, and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income:

			Gross		Gross
(dollars in thousands)	Amortized		Unrealized		Unrealized			Fair
March 31, 2020	Cost		Gains		Losses			Value
Available for sale
Government agency securities	$	1,410	$	16	$	—		$	1,426
SBA agency securities		4,565		87		(5	)		4,647
Mortgage-backed securities- Government sponsored agencies		18,260		520		(8	)		18,772
Collateralized mortgage obligations		11,036		183		—			11,219
Corporate debt securities		90,185		204		(159	)		90,230
Total	$	125,456	$	1,010	$	(172	)	$	126,294

Held to maturity
Municipal taxable securities	$	3,003	$	158	$	—		$	3,161
Municipal securities		4,822		171		—			4,993
Total	$	7,825	$	329	$	—		$	8,154

December 31, 2019
Available for sale
Government agency securities	$	1,591	$	—	$	(19	)	$	1,572
SBA agency securities		4,671		42		(22	)		4,691
Mortgage-backed securities- Government sponsored agencies		19,126		74		(29	)		19,171
Collateralized mortgage obligations		11,641		38		(25	)		11,654
Corporate debt securities		88,700		281		—			88,981
Total	$	125,729	$	435	$	(95	)	$	126,069

Held to maturity
Municipal taxable securities	$	3,505	$	147	$	—		$	3,652
Municipal securities		4,827		153		—			4,980
Total	$	8,332	$	300	$	—		$	8,632

One security with a fair value of $608,000 and $627,000 at March 31, 2020 and December 31, 2019, respectively, was pledged to secure a local agency deposit.

The amortized cost and fair value of the investment securities portfolio at March 31, 2020 and December 31, 2019 are shown by expected maturity below. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations with or without call or prepayment penalties.

	Less than One Year				More than One Year to Five Years				More than Five Years to Ten Years				More than Ten Years				Total
	Amortized		Estimated		Amortized		Estimated		Amortized		Estimated		Amortized		Estimated		Amortized		Estimated
(dollars in thousands)	Cost		Fair Value		Cost		Fair Value		Cost		Fair Value		Cost		Fair Value		Cost		Fair Value
March 31, 2020
Government agency securities	$	—	$	—	$	1,410	$	1,426	$	—	$	—	$	—	$	—	$	1,410	$	1,426
SBA securities		—		—		656		678		3,909		3,969		—		—		4,565		4,647
Mortgage-backed securities- Government sponsored agencies		3,532		3,566		14,728		15,206		—		—		—		—		18,260		18,772
Collateralized mortgage obligations		—		—		8,855		8,984		2,181		2,235		—		—		11,036		11,219
Corporate debt securities		72,413		72,415		2,002		1,998		11,762		11,937		4,008		3,880		90,185		90,230
Total available for sale	$	75,945	$	75,981	$	27,651	$	28,292	$	17,852	$	18,141	$	4,008	$	3,880	$	125,456	$	126,294

Municipal taxable securities	$	787	$	804	$	1,712	$	1,767	$	504	$	590	$	—	$	—	$	3,003	$	3,161
Municipal securities		—		—		40		40		876		903		3,906		4,050		4,822		4,993
Total held to maturity	$	787	$	804	$	1,752	$	1,807	$	1,380	$	1,493	$	3,906	$	4,050	$	7,825	$	8,154

December 31, 2019
Government agency securities	$	—	$	—	$	1,591	$	1,572	$	—	$	—	$	—	$	—	$	1,591	$	1,572
SBA securities		—		—		714		725		3,957		3,966		—		—		4,671		4,691
Mortgage-backed securities- Government sponsored agencies		3,663		3,679		13,027		13,059		2,436		2,433		—		—		19,126		19,171
Collateralized mortgage obligations		—		—		9,288		9,265		2,353		2,389		—		—		11,641		11,654
Corporate debt securities		70,914		70,919		2,002		2,008		11,772		12,024		4,012		4,030		88,700		88,981
Total available for sale	$	74,577	$	74,598	$	26,622	$	26,629	$	20,518	$	20,812	$	4,012	$	4,030	$	125,729	$	126,069

Municipal taxable securities	$	285	$	289	$	2,716	$	2,784	$	504	$	579	$	—	$	—	$	3,505	$	3,652
Municipal securities		—		—		40		40		366		379		4,421		4,561		4,827		4,980
Total held to maturity	$	285	$	289	$	2,756	$	2,824	$	870	$	958	$	4,421	$	4,561	$	8,332	$	8,632

The following table summarizes investment securities with unrealized losses at March 31, 2020 and December 31, 2019, aggregated by major security type and length of time in a continuous unrealized loss position:

	Less than Twelve Months							Twelve Months or More							Total
(dollars in thousands)	Unrealized Losses			Estimated Fair Value		No. of Issuances		Unrealized Losses			Estimated Fair Value		No. of Issuances		Unrealized Losses			Estimated Fair Value		No. of Issuances
March 31, 2020
SBA securities	$	(5	)	$	1,440		2	$	—		$	—		—	$	(5	)	$	1,440		2
Mortgage-backed securities- Government sponsored agencies		(8	)		1,039		6		—			—		—		(8	)		1,039		6
Corporate debt securities		(159	)		7,971		4		—			—		—		(159	)		7,971		4
Total available for sale	$	(172	)	$	10,450		12	$	—		$	—		—	$	(172	)	$	10,450		12

Municipal securities	$	—		$	—		—	$	—		$	—		—	$	—		$	—		—
Total held to maturity	$	—		$	—		—	$	—		$	—		—	$	—		$	—		—

December 31, 2019
Government agency securities	$	(19	)	$	1,572		2	$	—		$	—		—	$	(19	)	$	1,572		2
SBA securities		(22	)		1,469		2		—			—		—		(22	)		1,469		2
Mortgage-backed securities- Government sponsored agencies		(5	)		2,631		4		(24	)		3,912		6		(29	)		6,543		10
Collateralized mortgage obligations		(10	)		5,738		3		(15	)		953		2		(25	)		6,691		5
Total available for sale	$	(56	)	$	11,410		11	$	(39	)	$	4,865		8	$	(95	)	$	16,275		19

Municipal securities	$	—		$	—		—	$	—		$	—		—	$	—		$	—		—
Total held to maturity	$	—		$	—		—	$	—		$	—		—	$	—		$	—		—

Unrealized losses have not been recognized into income because the issuer bonds are of high credit quality, management does not intend to sell, it is not more likely than not that management would be required to sell the securities prior to their anticipated recovery and the decline in fair value is largely due to changes in interest rates. The fair value is expected to recover as the bonds approach maturity.

Management evaluates securities for other-than-temporary impairment (“OTTI”) on a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. For securities in an unrealized loss position, management considers the extent and duration of the unrealized loss, and the financial condition and near-term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings.

Loans and Allowance for Loan Losses

3 Months Ended

Mar. 31, 2020

Receivables [Abstract]

Loans and Allowance for Loan Losses

NOTE 5 - LOANS AND ALLOWANCE FOR LOAN LOSSES

The Company's loan portfolio consists primarily of loans to borrowers within the Southern California metropolitan area, the New York City metropolitan area, the Chicago, Illinois metropolitan area and Las Vegas, Nevada. Although the Company seeks to avoid concentrations of loans to a single industry or based upon a single class of collateral, real estate and real estate associated businesses are among the principal industries in the Company's market area and, as a result, the Company's loan and collateral portfolios are, to some degree, concentrated in those industries.

The following tables present the balance and activity related to the allowance for loan losses for held for investment loans by type for the periods presented.

	Three Months Ended March 31,
	2020													2019
(dollars in thousands)	Real Estate		Commercial			Other		Unallocated			Total			Real Estate		Commercial			Other		Total
Allowance for loan losses:
Beginning balance	$	15,118	$	3,588		$	9	$	101		$	18,816		$	13,437	$	4,140		$	—	$	17,577
Additions (reductions) to the allowance charged to expense		1,273		735			7		(70	)		1,945			952		(405	)		3		550
Charge-offs on loans		—		(631	)		—		—			(631	)		—		—			—		—
Recoveries on loans		—		—			—		—			—			—		109			—		109
Ending balance	$	16,391	$	3,692		$	16	$	31		$	20,130		$	14,389	$	3,844		$	3	$	18,236

	For the year end December 31, 2019
(dollars in thousands)	Real Estate			Commercial			Other		Unallocated		Total
Allowance for loan losses:
Beginning of year	$	13,437		$	4,140		$	—	$	—	$	17,577
Additions (reductions) to the allowance charged to expense		1,847			433			9		101		2,390
Charge-offs on loans		(166	)		(1,093	)		—		—		(1,259	)
Recoveries on loans		—			108			—		—		108
Ending balance	$	15,118		$	3,588		$	9	$	101	$	18,816

The following table presents the recorded investment in loans and impairment method as of March 31, 2020 and March 31, 2019, and the activity in the allowance for loan losses for the year ended December 31, 2019, by portfolio segment:

(dollars in thousands)
March 31, 2020	Real Estate		Commercial		Other		Unallocated		Total
Reserves:
Specific	$	—	$	—	$	—	$	—	$	—
General		16,391		3,692		16		31		20,130
Total allowance for loan losses	$	16,391	$	3,692	$	16	$	31	$	20,130
Loans evaluated for impairment:
Individually		5,376		14,898		—		—		20,274
Collectively		2,039,968		338,270		1,470		—		2,379,708
Total loans, net of deferred loan fees and unaccreted discount on acquired loans	$	2,045,344	$	353,168	$	1,470	$	—	$	2,399,982

March 31, 2019	Real Estate		Commercial		Unallocated		Total
Reserves:
Specific	$	—	$	11	$	—	$	11
General		14,389		3,833		3		18,225
Total allowance for loan losses		14,389		3,844		3		18,236
Loans evaluated for impairment:
Individually		2,365		221		—		2,586
Collectively		1,765,585		351,906		336		2,117,827
Total loans, net of deferred loan fees and unaccreted discount on acquired loans	$	1,767,950	$	352,127	$	336	$	2,120,413

December 31, 2019	Real Estate		Commercial		Other		Unallocated		Total
Reserves:
Specific	$	—	$	—	$	—	$	—	$	—
General		15,118		3,588		9		101		18,816
Loans acquired with deteriorated credit quality		—		—		—				—
Total allowance for loan losses	$	15,118	$	3,588	$	9	$	101	$	18,816
Loans evaluated for impairment:
Individually	$	3,795	$	9,423	$	—	$	—	$	13,218
Collectively		1,842,747		340,148		821		—		2,183,716
Loans acquired with deteriorated credit quality		—		—		—				—
Total loans, net of deferred loan fees and unaccreted discount on acquired loans	$	1,846,542	$	349,571	$	821	$	—	$	2,196,934

The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as current financial information, historical payment experience, collateral adequacy, credit documentation, and current economic trends, among other factors. The Company analyzes loans individually by classifying the loans as to credit risk. This analysis typically includes larger, non-homogeneous loans such as commercial real estate and commercial and industrial loans. This analysis is performed on an ongoing basis as new information is obtained. The Company uses the following definitions for risk ratings:

Pass - Loans classified as pass include loans not meeting the risk ratings defined below.

Special Mention - Loans classified as special mention have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution's credit position at some future date.

Substandard - Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected.

Impaired - A loan is considered impaired, when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. Additionally, all loans classified as troubled debt restructurings are considered impaired.

The risk category of loans by class of loans was as follows at March 31, 2020 and December 31, 2019:

(dollars in thousands)			Special
March 31, 2020	Pass		Mention		Substandard		Impaired ⁽¹⁾		Total
Real estate:
Construction and land development	$	119,681	$	—	$	173	$	261	$	120,115
Commercial real estate		804,312		29,073		19,009		2,186		854,580
Single-family residential mortgages		1,066,360		495		865		2,929		1,070,649
Commercial:
Other		261,934		6,080		5,719		1,869		275,602
SBA		59,897		189		4,451		13,029		77,566
Other:		1,470		—		—		—		1,470
Total loans	$	2,313,654	$	35,837	$	30,217	$	20,274	$	2,399,982

(dollars in thousands)			Special
December 31, 2019	Pass		Mention		Substandard		Impaired ⁽¹⁾		Total
Real estate:
Construction and land development	$	95,756	$	—	$	—	$	264	$	96,020
Commercial real estate		767,603		5,353		18,115		2,197		793,268
Single-family residential mortgages		955,327		—		593		1,334		957,254
Commercial:
Other		265,178		4,078		5,330		—		274,586
SBA		61,496		189		3,877		9,423		74,985
Other:		821		—		—		—		821
Total loans	$	2,146,181	$	9,620	$	27,915	$	13,218	$	2,196,934

(1)

Loans, net of deferred fees

The following table presents the aging of the recorded investment in past-due loans at March 31, 2020 and December 31, 2019 by class of loans:

(dollars in thousands)	30-59		60-89		90 Days		Total		Loans Not		Total		Non- Accrual
March 31, 2020	Days		Days		Or More		Past Due		Past Due		Loans		Loans ⁽¹⁾
Real estate:
Construction and land development	$	—	$	—	$	—	$	—	$	120,115	$	120,115	$	—
Commercial real estate		11,606		—		725		12,331		842,249		854,580		725
Single-family residential mortgages		3,048		2,669		1,813		7,530		1,063,119		1,070,649		2,930
Commercial:
Other		1,554		1,090		1,315		3,959		271,643		275,602		1,363
SBA		2,671		646		12,987		16,304		61,262		77,566		12,987
Other:		74		—		—		74		1,396		1,470		—
	$	18,953	$	4,405	$	16,840	$	40,198	$	2,359,784	$	2,399,982	$	18,005
Real estate:
Single-family residential mortgages held for sale	$	404	$	—	$	—	$	404	$	51,692	$	52,096	$	—

	30-59		60-89		90 Days		Total		Loans Not		Total		Non- Accrual
December 31, 2019	Days		Days		Or More		Past Due		Past Due		Loans		Loans ⁽¹⁾
Real estate:
Construction and land development	$	—	$	—	$	—	$	—	$	96,020	$	96,020	$	—
Commercial real estate		—		—		725		725		792,543		793,268		725
Single-family residential mortgages		1,454		1,560		450		3,464		953,790		957,254		1,334
Commercial:
Other		—		—		—		—		274,586		274,586		—
SBA		2,263		—		9,378		11,641		63,344		74,985		9,378
Other:		—		—		—		—		821		821		—
	$	3,717	$	1,560	$	10,553	$	15,830	$	2,181,104	$	2,196,934	$	11,437
Real estate:
Single-family residential mortgages held for sale	$	—	$	—	$	—	$	—	$	108,194	$	108,194	$	—

(1)

Included in total loans.

The Company has one loan in the amount of $225,000 90 days or more past due and still accruing at March 31, 2020.

Information relating to individually impaired loans presented by class of loans was as follows at March 31, 2020 and December 31, 2019:

(dollars in thousands)	Principal		Recorded		Related
March 31, 2020	Balance		Investment		Allowance
With no related allowance recorded
Construction and land development	$	261	$	261	$	—
Commercial and industrial		1,881		1,869
Commercial real estate		2,186		2,186		—
Residential mortgage loans		2,965		2,929		—
Commercial – SBA		13,039		13,029		—
With related allowance recorded
Commercial and industrial		—		—		—
Single-family residential mortgage		—		—		—
Total	$	20,332	$	20,274	$	—

(dollars in thousands)	Principal		Recorded		Average		Interest		Related
December 31, 2019	Balance		Investment		Balance		Income		Allowance
With no related allowance recorded
Construction and land development	$	264	$	264	$	271	$	24	$	—
Commercial real estate		2,198		2,197		2,384		100		—
Residential mortgage loans		1,349		1,334		1,351		—		—
Commercial – SBA		9,423		9,423		10,791		4		—
With related allowance recorded
Commercial – SBA		—		—		—		—		—
Total	$	13,234	$	13,218	$	14,797	$	128	$	—

The following table presents information on impaired loans and leases, disaggregated by loan segment, for the periods indicated:

	Three Months Ended
	March 31, 2020				March 31, 2019
	Average		Interest		Average		Interest
(dollars in thousands)	Balance		Income		Balance		Income
With no related allowance recorded
Construction and land development	$	262	$	2	$	275	$	6
Commercial and industrial		1,987		9		—		—
Commercial real estate		2,423		25		2,100		17
Residential mortgage loans		2,962		—		—		—
Commercial – SBA		15,153		1		56		1
With related allowance recorded
Commercial - SBA		—		—		166		—
	$	22,787	$	37	$	2,597	$	24

No interest income was recognized on a cash basis for the three months ended March 31, 2020 and 2019 and for the year ended December 31, 2019.

The Company had five and four loans identified as troubled debt restructurings (“TDRs”) at March 31, 2020 and December 31, 2019, respectively, with aggregate balances of $2.3 million and $1.8 million, respectively. There were no specific reserves allocated to the loans as of March 31, 2020 and December 31, 2019. There are no commitments to lend additional amounts at March 31, 2020 and December 31, 2019 to customers with outstanding loans that are classified as TDRs. There were no loans that were modified as TDRs during the past twelve months that had payment defaults during the periods.

The following table presents loans by class modified as TDRs that occurred during the three months ended March 31, 2020. There was one loan modified as a TDR during the three months ended March 31, 2020. There were no new TDRs during the three months ended March 31, 2019. The modification of the terms generally included loans where a moratorium on loan payments was granted. Such moratoriums ranged from six months to nine months on the loans restructured in 2020 and 2019.

Pre-

Post-

Modification

(dollars in thousands)

Number of

Recorded

March 31, 2020

Loans

Investment

Commercial and industrial

506

Total

506

Loan Servicing

3 Months Ended

Mar. 31, 2020

Loan Servicing [Abstract]

Loan Servicing

NOTE 6 - LOAN SERVICING

Mortgage and SBA loans serviced for others are not reported as assets. The principal balances at March 31, 2020 and December 31, 2019 are as follows:

	March 31,		December 31,
(dollars in thousands)	2020		2019
Loans serviced for others:
Mortgage loans	$	1,673,304	$	1,683,298
SBA loans	$	156,750	$	170,849
Commercial real estate loans	$	4,199	$	4,216

The fair value of servicing assets for mortgage loans was $13.2 million and $15.1 million at March 31, 2020 and December 31, 2019, respectively. The fair value of servicing assets for SBA loans was $4.1 million and $5.6 million at March 31, 2020 and December 31, 2019, respectively. Estimates of the loan servicing asset fair value are derived through a discounted cash flow analysis. Portfolio characteristics include loan delinquency rates, age of loans, note rate and geography. The assumptions embedded in the valuation are obtained from a range of metrics utilized by active buyers in the market place. The analysis accounts for recent transactions, and supply and demand within the market.

Servicing fees net of servicing asset amortization totaled $592,000 and $840,000 for the three months ended March 31, 2020 and 2019, respectively.

When mortgage and SBA loans are sold with servicing retained, servicing rights are initially recorded at fair value with the income statement effect recorded in gains on sales of loans. Fair value is based on a valuation model that calculates the present value of estimated future net servicing income. All classes of servicing assets are subsequently measured using the amortization method which requires servicing rights to be amortized into noninterest income in proportion to, and over the period of, the estimated future net servicing income of the underlying loans.

Servicing rights are evaluated for impairment based upon the fair value of the rights as compared to carrying amount. Impairment is recognized through a valuation allowance for an individual grouping, to the extent that fair value is less than the carrying amount. If the Company later determines that all or a portion of the impairment no longer exists for a particular grouping, a reduction of the allowance may be recorded as an increase to income.

Servicing fee income is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of the outstanding principal. The amortization of mortgage servicing rights is netted against loan servicing fee income.

	Three Months Ended						Three Months Ended
	March 31, 2020						March 31, 2019
	Mortgage			SBA			Mortgage			SBA
(dollars in thousands)	Loans			Loans			Loans			Loans
Servicing assets:
Beginning of period	$	12,997		$	4,086		$	12,858		$	4,512
Additions		789			38			604			112
Disposals		(343	)		(217	)		(33	)		(127	)
Amortized to expense		(382	)		(142	)		(466	)		(172	)
End of period	$	13,061		$	3,765		$	12,963		$	4,325

Goodwill and Intangibles

3 Months Ended

Mar. 31, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangibles

NOTE 7 - GOODWILL AND INTANGIBLES

Goodwill is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any noncontrolling interests in the acquiree, over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill resulting from whole bank acquisitions is not amortized, but tested for impairment at least annually. The Company has selected December 31st as the date to perform the annual impairment test. Goodwill amounted to $69.8 million at March 31, 2020 and $58.6 million at December 31, 2019, and is the only intangible asset with an indefinite life on the balance sheet. There were no impairment losses recognized on goodwill during the three months ended March 31, 2020 and 2019.

Other intangible assets consist of core deposit intangible ("CDI") assets arising from whole bank acquisitions. CDI assets are amortized on an accelerated method over their estimated useful life of 8 to 10 years. The unamortized balance at March 31, 2020 and December 31, 2019 was $6.2 million and $6.1 million, respectively. CDI amortization expense was $357,000 and $388,000 for the three months ended March 31, 2020 and March 31, 2019, respectively.

Estimated CDI amortization expense for future years is as follows:

(dollars in thousands)
As of March 31:
Remainder of 2020	$	1,037
2021		1,121
2022		936
2023		800
2024		683
Thereafter		1,657
Total	$	6,234

Deposits

3 Months Ended

Mar. 31, 2020

Maturities Of Time Deposits [Abstract]

Deposits

NOTE 8 - DEPOSITS

At March 31, 2020, the scheduled maturities of time deposits are as follows:

(dollars in thousands)	March 31, 2020
One year	$	1,267,249
Two to three years		76,236
Over three years		16,301
Total	$	1,359,786

The Board of Governors of the Federal Reserve System (“Federal Reserve”) announced the reduction of the reserve requirement ratio to zero percent across all deposit tiers, effective March 26, 2020. Depository institutions that were required to maintain deposits in a Federal Reserve bank account to satisfy reserve requirements will no longer be required to do and can use the additional liquidity to lend to individuals and businesses. The Federal Reserve has indicated that it may adjust reserve requirement ratios in the future if conditions warrant.

Long-term Debt

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Long-term Debt

NOTE 9 - LONG-TERM DEBT

In March 2016, the Company issued $50 million of 6.5% fixed to floating rate subordinated debentures, due March 31, 2026. The interest rate is fixed through March 31, 2021 and floats at the 3 month LIBOR plus 516 basis points thereafter. The Company can redeem these subordinated debentures beginning March 31, 2021. The subordinated debentures are considered Tier 2 capital at the Company. The Company allocated $35 million to the Bank as Tier 1 capital.

In November 2018, the Company issued $55 million of 6.18% fixed to floating rate subordinated debentures, due December 1, 2028. The interest rate is fixed through December 1, 2023 and floats at 3 month LIBOR plus 315 basis points thereafter. The Company can redeem these subordinated debentures beginning December 1, 2023. The subordinated debentures are considered Tier 2 capital at the Company. The Company allocated $25 million to the Bank as Tier 1 capital.

At March 31, 2020 and December 31, 2019, long-term debt was as follows:

	March 31,		December 31,
(dollars in thousands)	2020		2019
Principal	$	105,000	$	105,000
Unamortized debt issuance costs	$	865	$	951

The following table presents interest and amortization expense the Company incurred for the three months ended March 31, 2020 and 2019:

	For the Three Months Ended March 31,
(dollars in thousands)	2020		2019
Interest Expense:
Interest	$	1,662	$	1,662
Amortization		86		85

In July 2017, British banking regulators announced plans to eliminate the LIBOR rate by the end of 2021, before this long-term debt and subordinated debentures mature. For these subordinated debentures, there are provisions for amendments to establish a new interest rate benchmark

Subordinated Debentures

3 Months Ended

Mar. 31, 2020

Debt Instruments [Abstract]

Subordinated Debentures

NOTE 10 - SUBORDINATED DEBENTURES

The Company, through the acquisition of TFC Holding Company (“TFC”) in 2016, acquired TFC Statutory Trust (the “Trust”). The Trust conducted a pooled private offering of 5,000 trust preferred securities with a liquidation amount of $1,000 per security. TFC issued $5 million of subordinated debentures to the Trust in exchange for ownership of all of the common securities of the Trust and the proceeds of the preferred securities sold by the Trust. The Company is not considered the primary beneficiary of this Trust (variable interest entity), therefore the Trust is not consolidated in the Company's financial statements, but rather the subordinated debentures are shown as a liability at market value as of the close of the acquisition, which was $3.3 million. There was a $1.9 million valuation reserve recorded to arrive at market value, which is treated as a yield adjustment and is amortized over the life of the security. The Company also purchased an investment in the common stock of the Trust for $155,000, which is included in other assets. The Company may redeem the subordinated debentures, subject to prior approval by the Federal Reserve on or after March 15, 2012, at 100% of the principal amount, plus accrued and unpaid interest. The subordinated debentures mature on March 15, 2037. The Company has the option to defer interest payments on the subordinated debentures from time to time for a period not to exceed five consecutive years. The Company has been paying interest on a quarterly basis. The subordinated debentures may be included in Tier I capital (with certain limitations applicable) under current regulatory guidelines and interpretations. The subordinated debentures have a variable rate of interest equal to the three month LIBOR plus 1.65%, which was 2.39% as of March 31, 2020 and 3.54% at December 31, 2019.

In October 2018, the Company, through the acquisition of First American International Corp. (“FAIC”), acquired First American International Statutory Trust I (“FAIC Trust”), a Delaware statutory trust formed in December 2004. The FAIC Trust issued 7,000 units of thirty-year fixed to floating rate capital securities with an aggregate liquidation amount of $7,000,000 to an independent investor, and FAIC issued $7 million of subordinated debentures to the FAIC Trust and all of its common securities, amounting to $217,000, which is included in other assets. There was a $1.2 million valuation reserve recorded to arrive at market value which is treated as a yield adjustment and is amortized over the life of the security. The Company has the option to defer interest payments on the subordinated debentures from time to time for a period not to exceed five consecutive years. The subordinated debentures have a variable rate of interest equal to the three-month LIBOR plus 2.25% through final maturity on December 15, 2034. The rate at March 31, 2020 was 2.99% and 4.14% at December 31, 2019.

In January 2020, the Company, through the acquisition of PGBH, acquired Pacific Global Bank Trust I (“PGBH Trust”), a Delaware statutory trust formed in December 2004. PGBH Trust issued 5,000 units of fixed to floating rate capital securities with an aggregate liquidation amount of $5,000,000 and 155 common securities with an aggregate liquidation amount of $155,000. PGBH issued $5.2 million of subordinated debentures to PGBH Trust in exchange for ownership of all the common securities of PGBH Trust. There was a $763,000 valuation reserve recorded to arrive at market value which is treated as a yield adjustment and is amortized over the life of the security. The Company has the option to defer interest payments on the subordinated debentures from time to time for a period not to exceed five consecutive years. The subordinated debentures have a variable rate of interest equal to the three-month LIBOR plus 2.10% through final maturity on December 15, 2034. The rate at March 31, 2020 was 2.84%.

The Company paid interest expense of $153,000 and $144,000 for the three months ended March 31, 2020 and 2019, respectively. The amount of aggregate amortization expense recognized for the three months ended March 31, 2020 and 2019 was $55,000 and $42,000, respectively.

For regulatory reporting purposes, the Federal Reserve has indicated that the capital or trust preferred securities qualify as Tier I capital of the Company subject to previously specified limitations, until further notice. If regulators make a determination that the capital securities can no longer be considered in regulatory capital, the securities become callable and the Company may redeem them.

In July 2017, British banking regulators announced plans to eliminate the LIBOR rate by the end of 2021, before these subordinated notes and debentures mature. For these subordinated debentures, there are provisions for amendments to establish a new interest rate benchmark.

Borrowing Arrangements

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Borrowing Arrangements

NOTE 11 - BORROWING ARRANGEMENTS

The Company has established secured and unsecured lines of credit. The Company may borrow funds from time to time on a term or overnight basis from the Federal Home Loan Bank of San Francisco ("FHLB"), the Federal Reserve Bank of San Francisco ("FRB") and other financial institutions as indicated below.

FHLB Advances. The Company borrowed $150.0 million five-year term fixed rate FHLB advances at a weighted average fixed rate of 1.18% and the advances will mature by March 2025.

Federal Funds Arrangements with Commercial Banks. At March 31, 2020, the Company may borrow on an unsecured basis, up to $20.0 million, $10.0 million, $12.0 million and $5.0 million overnight from Zions Bank, Wells Fargo Bank, First Tennessee National Bank, and Pacific Coast Bankers' Bank, respectively.

Letter of Credit Arrangements. At March 31, 2020, the Company had an unsecured commercial letter of credit line with Wells Fargo Bank for $2.0 million.

FRB Secured Line of Credit. The secured borrowing capacity with the FRB of $14.0 million at March 31, 2020 is collateralized by loans pledged with a carrying value of $28.6 million.

FHLB Secured Line of Credit. The secured borrowing capacity with the FHLB of $468.2 million at March 31, 2020 is collateralized by loans pledged with a carrying value of $568.7 million.

At March 31, 2020, the Company had $150.0 million at a weighted average rate of 1.18% in long-term (five year) advances with the FHLB, and no overnight or long-term advances at December 31, 2019. There were no amounts outstanding under any of the other borrowing arrangements above as of March 31, 2020 and at December 31, 2019 except FHLB advances maturing in 2025.

Income Taxes

3 Months Ended

Mar. 31, 2020

Income Tax Disclosure [Abstract]

Income Taxes

NOTE 12 - INCOME TAXES

The asset and liability method is used in accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse.

During the three months ended March 31, 2020 and 2019, the Company recorded an income tax provision of $3.3 million and $3.9 million, respectively, reflecting an effective tax rate of 32.5% and 27.1% for the three months ended March 31, 2020 and 2019, respectively. The Company recognized a tax benefit from stock option exercises of $28,000 and $133,000 for the three months ended March 31, 2020 and 2019, respectively.

Commitments

3 Months Ended

Mar. 31, 2020

Commitments And Contingencies Disclosure [Abstract]

Commitments

NOTE 13 - COMMITMENTS

The Company leases several of its operating facilities under various noncancellable operating leases expiring at various dates through 2028. The Company is also responsible for common area maintenance, taxes and insurance at the various branch locations.

Future minimum rent payments on the Company’s leases were as follows at March 31, 2020:

(dollars in thousands)
Year ending December 31:
2020 remaining	$	4,241
2021		4,751
2022		4,284
2023		3,322
2024		2,224
Thereafter		9,016
Total	$	27,838

The minimum rent payments shown above are given for the existing lease obligation and are not a forecast of future rental expense. Total rental expense, recognized on a straight-line basis, was $1.5 million and $1.5 million for the three months ended March 31, 2020 and 2019, respectively. The Company received rental income of $84,000 and $49,000 in the first quarter of 2020 and 2019, respectively.

In the ordinary course of business, the Company enters into financial commitments to meet the financing needs of its customers. These financial commitments include commitments to extend credit, unused lines of credit, commercial and similar letters of credit and standby letters of credit. Those instruments involve to varying degrees, elements of credit and interest rate risk not recognized in the Company's financial statements.

The Company's exposure to loan loss in the event of nonperformance on these financial commitments is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments as it does for loans reflected in the financial statements.

At March 31, 2020 and December 31, 2019, the Company had the following financial commitments whose contractual amount represents credit risk:

	March 31,		December 31,
(dollars in thousands)	2020		2019
Commitments to extend credit	$	387,248	$	326,126
Commercial and similar letters of credit		227		358
Standby letters of credit		3,963		3,715
Total	$	391,438	$	330,199

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Since many of the commitments are expected to expire without being drawn upon, the total amounts do not necessarily represent future cash requirements. The Company evaluates each client's credit worthiness on a case-by-case basis. The amount of collateral obtained if deemed necessary by the Company is based on management's credit evaluation of the customer.

The Company is involved in various matters of litigation which have arisen in the ordinary course of business and accruals for estimates of potential losses have been provided when necessary and appropriate under generally accepted accounting principles. In the opinion of management, the disposition of such pending litigation will not have a material effect on the Company's financial statements.

Related Party Transactions

3 Months Ended

Mar. 31, 2020

Related Party Transactions

NOTE 14 - RELATED PARTY TRANSACTIONS

Loans to principal officers, directors, and their affiliates were as follows:

	March 31,			December 31,
(dollars in thousands)	2020			2019
Beginning balance	$	4,000		$	3,600
New loans and advances		4,000			16,180
Repayments		(4,000	)	$	(15,780	)
Ending balance	$	4,000		$	4,000

There were no unfunded loan commitments outstanding to executive officers, directors and their related interests with whom they are associated at March 31, 2020 and at December 31, 2019.

Deposits from principal officers, directors, and their affiliates at March 31, 2020 and December 31, 2019 were $81.4 million and $84.6 million, respectively.

Stock-based Compensation

3 Months Ended

Mar. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-based Compensation

NOTE 15 - STOCK-BASED COMPENSATION

RBB Bancorp 2010 Stock Option Plan

Under the RBB Bancorp 2010 Stock Option Plan (the “2010 Plan”), the Company was permitted to grant awards to eligible persons in the form of qualified and non-qualified stock options. The Company reserved up to 30% of the issued and outstanding shares of common stock as of the date the Company adopted the 2010 Plan or 3,494,478 shares, for issuance under the 2010 Plan. After approval of the 2017 Omnibus Stock Incentive Plan (the “OSIP”) at the Company’s annual meeting on May 23, 2017, no additional grants were made under the 2010 Plan. The 2010 Plan has been terminated and options that were granted under that Plan have become subject to the OSIP. Awards that were granted under the 2010 Plan will remain exercisable pursuant to the terms and conditions set forth in individual award agreements, but such awards will be assumed and administered under the OSIP. The 2010 Plan award agreements allow for acceleration of exercise privileges of grants upon occurrence of a change in control of the Company. If a participant’s job is terminated for cause, then all unvested awards expire at the date of termination.

RBB Bancorp 2017 Omnibus Stock Incentive Plan

The OSIP was adopted by the Company’s board of directors on January 18, 2017 and approved by the Company’s shareholders at the Company’s annual meeting on May 23, 2017. The OSIP was designed to ensure continued availability of equity awards that will assist the Company in attracting and retaining competent managerial personnel and rewarding key employees, directors and other service providers for high levels of performance. Pursuant to the OSIP, the Company’s board of directors are allowed to grant awards to eligible persons in the form of qualified and non-qualified stock options, restricted stock, restricted stock units, stock appreciation rights and other incentive awards. The Company has reserved up to 30% of issued and outstanding shares of common stock as of the date the Company adopted the OSIP, or 3,848,341 shares. As of March 31, 2020, there were 1,207,045 shares of common stock available for issuance under the OSIP. This represents 6.11% of the issued and outstanding shares of the Company’s common stock as of March 31, 2020. Awards vest, become exercisable and contain such other terms and conditions as determined by the board of directors and set forth in individual agreements with the employees receiving the awards. The OSIP enables the board of directors to set specific performance criteria that must be met before an award vests. The OSIP allows for acceleration of vesting and exercise privileges of grants if a participant’s termination of employment is due to a change in control, death or total disability. If a participant’s job is terminated for cause, then all awards expire at the date of termination.

The Company recognized stock-based compensation expense of $161,000 and $231,000 and recognized income tax benefits on that expense of $28,000 and $92,000 for the three months ended March 31, 2020 and 2019, respectively.

The fair value of each option grant was estimated on the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions presented below for 2020 and 2019.

	2020			2019
Expected volatility		28.5	%		35.0	%
Expected term	6.0 years			6.0 years
Expected dividends		1.99	%		1.90	%
Risk free rate		1.31	%		2.66	%
Grant date fair value	$	4.61		$	6.32

Since the Company had a limited amount of historical stock activity, the expected volatility was based on the historical volatility of similar banks that had a longer trading history. The expected term represents the estimated average period of time that the options remain outstanding. The expected term of options granted is based on historical data and represents the period of time that options granted are expected to be outstanding. The risk free rate of return reflects the grant date interest rate offered for zero coupon U.S. Treasury bonds over the expected term of the options.

A summary of the status of awards pursuant to the Company's stock option plans as of March 31, 2020 and changes during the three months ended ended is presented below:

						Weighted-
				Weighted-		Average
				Average		Remaining	Aggregate
				Exercise		Contractual	Intrinsic
(dollars in thousands, except for share amounts)	Shares			Price		Term	Value
Outstanding at beginning of year		1,090,968		$	13.11
Granted		51,000			20.10
Exercised		(56,498	)		12.61
Forfeited/cancelled		(4,000	)		18.38
Outstanding at end of year		1,081,470		$	13.45	4.10 years	$	1,826

Options exercisable		982,470		$	12.87	3.57 years	$	1,826

As of March 31, 2020 there was approximately $512,000 of total unrecognized compensation cost related to outstanding stock options that will be recognized over a weighted-average period of 2.2 years.

The total fair value of the shares vested was $350,000, and $460,000 in 2020, and 2019, respectively. The number of unvested stock options were 99,000, and 76,500 with a weighted-average grant date fair value of $5.43 and $6.32 as of March 31, 2020, and December 31, 2019.

Cash received from the exercise of 56,498 share options was $712,000 for the period ended March 31, 2020 and cash received from the exercise of 200,629 share options was $2.8 million for the year ended December 31, 2019. The intrinsic value of options exercised was $389,000, and $1.2 million, in 2020 and 2019 respectively.

Regulatory Matters

3 Months Ended

Mar. 31, 2020

Banking And Thrift [Abstract]

Regulatory Matters

NOTE 16 - REGULATORY MATTERS

Holding companies (with assets over $3 billion at the beginning of the year) and banks are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory - and possibly additional discretionary - actions by regulators that, if undertaken, could have a direct material effect on the Company’s financial statements.

In July 2013, the federal bank regulatory agencies approved the final rules implementing the Basel Committee on Banking Supervision's capital guidelines for U.S. banks. The new rules became effective on January 1, 2015, with certain of the requirements phased-in over a multi-year schedule. Under the rules, minimum requirements increased for both the quantity and quality of capital held by the Bank. The rules include a common equity Tier 1 (“CET1”) capital to risk-weighted assets ratio with minimums for capital adequacy and prompt corrective action purposes of 4.5% and 6.5%, respectively. The minimum Tier 1 capital to risk-weighted assets ratio was raised from 4.0% to 6.0% under the capital adequacy framework and from 6.0% to 8.0% to be well-capitalized under the prompt corrective action framework. In addition, the rules introduced the concept of a "conservation buffer" of 2.5% applicable to the three capital adequacy risk-weighted asset ratios (CET1, Tier 1, and Total). The implementation of the capital conservation buffer began on January 1, 2016 at 0.625% and was phased in over a four-year period (increasing by that amount on each subsequent January 1, until it reached 2.5% on January 1, 2019). If the capital adequacy minimum ratios plus the phased-in conservation buffer amount exceed actual risk-weighted capital ratios, then dividends, share buybacks, and discretionary bonuses to executives could be limited in amount.

Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank must meet specific capital guidelines that involve quantitative measures of the Bank's assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. Capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum amounts and ratios (set forth in the table below) of total, Tier 1 and CET1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). As permitted by the regulators for financial institutions that are not deemed to be “advanced approaches” institutions, the Company has elected to opt out of the Basel III requirement to include accumulated other comprehensive income in risk-based capital. Management believes, at March 31, 2020 and December 31, 2019, that RBB and the Bank satisfied all capital adequacy requirements to which they were subject.

As defined in applicable regulations and set forth in the tables below, RBB and the Bank continue to exceed the regulatory capital minimum requirements and the Bank continues to exceed the "well capitalized" standards at the dates indicated:

						Amount of Capital Required
											Minimum Required Plus					To Be Well-
						Minimum Required					Capital					Capitalized
	Actual					for Capital Adequacy Purposes					Conservation Buffer Fully Phased-In					Under Prompt Corrective Provisions
(dollars in thousands)	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
As of March 31, 2020:
Tier 1 Leverage Ratio
Consolidated	$	347,133		11.74	%	NA		NA			NA		NA			NA		NA
Bank		426,236		14.44	%	$	118,042		4.0	%	$	118,042		4.0	%	$	147,552		5.0	%
Common Equity Tier 1 Risk- Based Capital Ratio
Consolidated		333,013		15.45	%	NA		NA			NA		NA			NA		NA
Bank		426,236		19.79	%		96,911		4.5	%		150,750		7.0	%		139,982		6.5	%
Tier 1 Risk-Based Capital Ratio
Consolidated		347,133		16.10	%	NA		NA			NA		NA			NA		NA
Bank		426,236		19.79	%		129,214		6.0	%		183,054		8.5	%		172,286		8.0	%
Total Risk-Based Capital Ratio
Consolidated		472,376		21.91	%	NA		NA			NA		NA			NA		NA
Bank		447,344		20.77	%		172,286		8.0	%		226,125		10.5	%		215,357		10.0	%

						Amount of Capital Required
											Minimum Required Plus					To Be Well-
						Minimum Required for Capital Adequacy					Capital Conservation Buffer					Capitalized Under Prompt Corrective
	Actual					Purposes					Fully Phased-In					Provisions
(dollars in thousands)	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
As of December 31, 2019:
Tier 1 Leverage Ratio
Consolidated	$	353,572		12.89	%	NA		NA			NA		NA			NA		NA
Bank		417,036		15.23	%	$	108,150		4.0	%	$	108,150		4.0	%	$	135,187		5.0	%
Common Equity Tier 1 Risk- Based Capital Ratio
Consolidated		343,899		17.16	%	NA		NA			NA		NA			NA		NA
Bank		417,036		20.87	%		89,127		4.5	%		138,642		7.0	%		128,739		6.5	%
Tier 1 Risk-Based Capital Ratio
Consolidated		353,572		17.65	%	NA		NA			NA		NA			NA		NA
Bank		417,036		20.87	%		118,836		6.0	%		168,351		8.5	%		158,448		8.0	%
Total Risk-Based Capital Ratio
Consolidated		477,262		23.82	%	NA		NA			NA		NA			NA		NA
Bank		436,677		21.86	%		158,448		8.0	%		207,964		10.5	%		198,061		10.0	%

The California Financial Code generally acts to prohibit banks from making a cash distribution to its shareholders in excess of the lesser of the bank's undivided profits or the bank's net income for its last three fiscal years less the amount of any distribution made by the bank's shareholders during the same period.

The California General Corporation Law generally acts to prohibit companies from paying dividends on common stock unless its retained earnings, immediately prior to the dividend payment, equals or exceeds the amount of the dividend. If a company fails this test, then it may still pay dividends if after giving effect to the dividend the company's assets are at least 125% of its liabilities.

Additionally, the Federal Reserve has issued guidance which requires that they be consulted before payment of a dividend if a financial holding company does not have earnings over the prior four quarters of at least equal to the dividend to be paid, plus other holding company obligations.

- Definition

The entire disclosure for regulatory capital requirement for depository and lending institutions. Institutions include, but not are not limited to, finance company, insured depository institution, bank holding company, savings and loan association holding company, bank and savings institution not federally insured, mortgage company, foreign financial institution and credit union.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

Fair Value Measurements

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

NOTE 17 - FAIR VALUE MEASUREMENTS

The following is a description of valuation methodologies used for assets and liabilities recorded at fair value:

Securities: The fair values of securities available for sale are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1) or matrix pricing, which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted prices for specific securities but rather by relying on the securities' relationship to other benchmark quoted securities (Level 2).

Other Real Estate Owned: Nonrecurring adjustments to certain commercial and residential real estate properties classified as other real estate owned (“OREO”) are measured at the lower of carrying amount or fair value, less costs to sell. In cases where the carrying amount exceeds the fair value, less costs to sell, an impairment loss is recognized. Fair values are generally based on third party appraisals of the property which are commonly adjusted by management to reflect an expectation of the amount to be ultimately collected and selling costs (Level 3).

Appraisals for OREO are performed by state licensed appraisers (for commercial properties) or state certified appraisers (for residential properties) whose qualifications and licenses have been reviewed and verified by the Company. When a Notice of Default is recorded, an appraisal report is ordered. Once received, a member of the credit administration department reviews the assumptions and approaches utilized in the appraisal as well as the overall resulting fair value in comparison to independent data sources such as recent market data or industry wide-statistics for residential appraisals. Commercial appraisals are sent to an independent third party to review. The Company also compares the actual selling price of collateral that has been sold to the most recent appraised value to determine what additional adjustments, if any, should be made to the appraisal values on any remaining other real estate owned to arrive at fair value. If the existing appraisal is older than twelve months a new appraisal report is ordered. No significant adjustments to appraised values have been made as a result of this comparison process as of March 31, 2020.

Collateral-dependent impaired loans: Collateral-dependent impaired loans are carried at fair value when it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the original loan agreement and the loan has been written down to the fair value of its underlying collateral, net of expected disposition costs where applicable.

The following table provides the hierarchy and fair value for each major category of assets and liabilities measured at fair value at March 31, 2020 and December 31, 2019:

(dollars in thousands)	Fair Value Measurements Using:
March 31, 2020	Level 1		Level 2		Level 3		Total
Assets measured at fair value:
On a recurring basis:
Securities available for sale
Government agency securities	$	—	$	1,426	$	—	$	1,426
SBA agency securities		—		4,647		—		4,647
Mortgage-backed securities		—		18,772		—		18,772
Collateralized mortgage obligations		—		11,219		—		11,219
Corporate debt securities		—		90,230		—		90,230
	$	—	$	126,294	$	—	$	126,294

On a non-recurring basis:
Commercial real estate - collateral dependent impaired loans	$	—	$	—	$	3,608	$	3,608
Other real estate owned		—		—		293		293
	$	—	$	—	$	3,901	$	3,901

December 31, 2019	Level 1		Level 2		Level 3		Total
Assets measured at fair value:
On a recurring basis:
Securities available for sale
Government agency securities	$	—	$	1,572	$	—	$	1,572
SBA agency securities		—		4,691		—		4,691
Mortgage-backed securities		—		19,171		—		19,171
Collateralized mortgage obligations		—		11,654		—		11,654
Commercial paper		—		69,898		—		69,898
Corporate debt securities		—		19,083		—		19,083
	$	—	$	126,069	$	—	$	126,069

On a non-recurring basis:
Other real estate owned	$	—	$	—	$	293	$	293

No write-downs to OREO were recorded for the three months ended March 31, 2020 or for the year ended December 31, 2019.

Quantitative information about the Company's impaired loans and OREO non-recurring Level 3 fair value measurements at March 31, 2020 and December 31, 2019 is as follows:


(dollars in thousands)	Fair Value		Valuation	Unobservable	Adjustment
March 31, 2020	Amount		Technique	Input	Range
Collateral dependent impaired loans - commercial real estate	$	3,608	Third Party Appraisals	Management Adjustments to Reflect Current Conditions and Selling Costs	5% - 6%
Other real estate owned	$	293	Third Party Appraisals	Management Adjustments to Reflect Current Conditions and Selling Costs	5%-6%
December 31, 2019
Other real estate owned	$	293	Third Party	Management Adjustments	5%-6%
			Appraisals	to Reflect Current
				Conditions and Selling
				Costs

OREO as of March 31, 2020 consists of one single-family residence with a fair value of $293,000.

Fair Value of Financial Instruments

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

NOTE 18 - FAIR VALUE OF FINANCIAL INSTRUMENTS

The fair value of a financial instrument is the amount at which the asset or obligation could be exchanged in a current transaction between willing parties, other than in a forced or liquidation sale. Fair value estimates are made at a specific point in time based on relevant market information and information about the financial instrument. These estimates do not reflect any premium or discount that could result from offering for sale at one time the entire holdings of a particular financial instrument. Because no market value exists for a significant portion of the financial instruments, fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature, involve uncertainties and matters of judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the estimates.

Fair value estimates are based on financial instruments both on and off the balance sheet without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Additionally, tax consequences related to the realization of the unrealized gains and losses can have a potential effect on fair value estimates and have not been considered in many of the estimates.

The fair value hierarchy level and estimated fair value of significant financial instruments at March 31, 2020 and December 31, 2019 are summarized as follows:

		March 31,				December 31,
		2020				2019
	Fair Value	Carrying		Fair		Carrying		Fair
(dollars in thousands)	Hierarchy	Value		Value		Value		Value
Financial Assets:
Cash and due from banks	Level 1	$	285,667	$	285,667	$	114,763	$	114,763
Federal funds sold and other cash equivalents	Level 1		75,300		75,300		67,000		67,000
Interest-earning deposits in other financial institutions	Level 1		600		600		600		600
Investment securities - AFS	Level 2		126,294		126,294		126,069		126,069
Investment securities - HTM	Level 2		7,825		8,154		8,332		8,632
Mortgage loans held for sale	Level 1		52,096		52,664		108,194		109,385
Loans, net	Level 3		2,379,852		2,325,638		2,178,118		2,158,970
Equity security	Level 3		11,817		11,817		11,826		11,826
Mortgage serving rights	Level 2		16,826		17,251		17,083		20,752

Financial Liabilities:
Deposits	Level 2	$	2,435,981	$	2,427,037	$	2,248,938	$	2,236,329
FHLB advances	Level 2		150,000		150,000		—		—
Long-term debt	Level 2		104,135		131,284		104,049		109,877
Subordinated debentures	Level 3		14,120		20,902		9,673		11,709

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Earnings Per Share

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Earnings Per Share

NOTE 19 - EARNINGS PER SHARE

The following is a reconciliation of net income and shares outstanding to the income and number of shares used to compute earnings per share (“EPS”):

	For the Three Months Ended March 31,
	2020					2019
(dollars in thousands except per share amounts)	Income			Shares		Income			Shares
Net income as reported	$	6,748				$	10,380
Less: Earnings allocated to participating securities		(10	)				(22	)
Shares outstanding					19,739,280					20,073,991
Impact of weighting shares					232,576					(69,700	)
Used in basic EPS		6,738			19,971,856		10,358			20,004,291
Dilutive effect of outstanding
Stock options					294,472					389,025
Used in dilutive EPS	$	6,738			20,266,328	$	10,358			20,393,316

Basic earnings per common share	$	0.34				$	0.52
Diluted earnings per common share		0.33					0.51

Revenue From Contracts With Customers

3 Months Ended

Mar. 31, 2020

Revenue From Contract With Customer [Abstract]

Revenue From Contracts With Customers

NOTE 20 – REVENUE FROM CONTRACTS WITH CUSTOMERS

On January 1, 2019, the Company adopted ASU 2014-09, Revenue from Contracts with Customers - Topic 606 and all subsequent ASUs that modified ASC 606. The Company adopted ASC 606 using the modified retrospective method applied to those contracts that were not completed as of January 1, 2019. The new standard did not materially impact the timing or measurement of the Company’s revenue recognition as it is consistent with the Company’s existing accounting for contracts within the scope of the new standard. There was no cumulative effect adjustment to retained earnings as a result of adopting this new standard.

The following is a summary of revenue from contracts with customers that are in-scope and not in-scope under Topic 606:

	For the Three Months Ended March 31,
(dollars in thousands)	2020		2019
Non-interest income, in scope ⁽¹⁾
Fees and service charges on deposit accounts	$	451	$	298
Other fees ⁽²⁾		149		198
Other income ⁽³⁾		452		291
Total in-scope non-interest income		1,052		787
Non-interest income, not in scope ⁽⁴⁾		3,563		3,415
Total non-interest income	$	4,615	$	4,202

(1)

There were no adjustments to the Company's financial statements recorded as a result of the adoption of ASC 606.

(2)

Other fees consists of wealth management fees, miscellaneous loan fees and postage/courier fees.

(3)

Other income consists of safe deposit box rental income, wire transfer fees, security brokerage fees, annuity sales, insurance activity and OREO income.

(4)

The amounts primarily represent revenue from contracts with customers that are out of scope of ASC 606: Net loan servicing income, letter of credit commissions, import/export commissions, recoveries on purchased loans, BOLI income, and gains (losses) on sales of mortgage loans, loans and investment securities.

The major revenue streams by fee type that are within the scope of ASC 606 presented in the above tables are described in additional detail below:

Fees and Services Charges on Deposit Accounts

Fees and service charges on deposit accounts include charges for analysis, overdraft, cash checking, ATM, and safe deposit activities executed by our deposit clients, as well as interchange income earned through card payment networks for the acceptance of card based transactions. Fees earned from our deposit clients are governed by contracts that provide for overall custody and access to deposited funds and other related services, and can be terminated at will by either party; this includes fees from money service businesses (“MSBs”). Fees received from deposit clients for the various deposit activities are recognized as revenue once the performance obligations are met. The adoption of ASU 2014-09 had no impact to the recognition of fees and service charges on deposit accounts.

Wealth Management Fees

The Company employs financial consultants to provide investment planning services for customers including wealth management services, asset allocation strategies, portfolio analysis and monitoring, investment strategies, and risk management strategies. The fees the Company earns are variable and are generally received monthly. The Company recognizes revenue for the services performed at quarter-end based on actual transaction details received from the broker dealer the Company engages.

In the Company’s wealth management division, revenue is primarily generated from (1) securities brokerage accounts, (2) investment advisor accounts, (3) full service brokerage implementation fees, and (4) life insurance and annuity products.

Gain on Sales of OREO and Fixed Assets

The Company records a gain or loss from the sale of OREO and fixed assets, when control of the property or asset transfers to the buyer, which generally occurs at the time of an executed deed or sales agreement. When the Company finances the sale of OREO to a buyer, the Company assesses whether the buyer is committed to perform their obligations under the contract and whether collectability of the transaction price is probable. Once these criteria are met, the OREO asset is derecognized and the gain or loss on sale is recorded upon transfer of control of the property to the buyer. In determining the gain or loss on the sale, the Company adjusts the transaction price and related gain or loss on sale if a significant financing component is present.

Qualified Affordable Housing Project Investments

3 Months Ended

Mar. 31, 2020

Text Block [Abstract]

Qualified Affordable Housing Project Investments

NOTE 21 - QUALIFIED AFFORDABLE HOUSING PROJECT INVESTMENTS

The Company began investing in qualified housing projects in 2016. At March 31, 2020 and December 31, 2019, the balance of the investment for qualified affordable housing projects was $8.4 million and $8.6 million, respectively. This balance is reflected in the accrued interest and other assets line on the consolidated balance sheets. Total unfunded commitments related to the investments in qualified housing projects totaled $2.2 million and $4.2 million at March 31, 2020 and December 31, 2019, respectively. The Company expects to fulfill these commitments between 2020 and 2027.

For the three months ended March 31, 2020 and 2019, the Company recognized amortization expense of $247,000 and $225,000, respectively, which was included within income tax expense on the consolidated statements of income.

Recent Developments

3 Months Ended

Mar. 31, 2020

Recent Developments [Abstract]

Recent Developments

NOTE 22 - RECENT DEVELOPMENTS

On April 20, 2020, RBB Bancorp announced a cash dividend of $0.06 per share for the first quarter of 2020. The dividend is payable on May 13, 2020 to common shareholders of record as of April 30, 2020.

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements and notes thereto of the Company have been prepared in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”) for Form 10-Q and conform to practices within the banking industry and include all of the information and disclosures required by accounting principles generally accepted in the United States of America (“GAAP”) for interim financial reporting. The accompanying unaudited consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments), which are necessary for a fair presentation of financial results for the interim periods presented. The results of operations for the three months ended March 31, 2020 are not necessarily indicative of the results for the full year. These interim unaudited financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto as of and for the year ended December 31, 2019, included in our Annual Report filed on Form 10-K for the fiscal year ended December 31, 2019 (our “2019 Annual Report”).
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. It is reasonably possible our estimate of the allowance for loan losses and the fair value of mortgage servicing rights could change as actual results could differ from those estimates. Actual results could differ from those estimates.
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies The accompanying unaudited consolidated financial statements were compiled in accordance with the accounting policies set forth in Note 2 – Basis of Presentation and Summary of Significant Policies in our Consolidated Financial Statements as of and for the year ended December 31, 2019, included in our 2019 Annual Report. The accompanying consolidated unaudited financial statements reflect all adjustments consisting of normal recurring adjustments that, in the opinion of management, are necessary to reflect a fair statement of our consolidated financial condition, results of operations, and cash flows. The results of operations for acquired companies are included from the dates of acquisition. Operating results for the three months ended March 31, 2020 are not necessarily indicative of the results that may be expected for the year ended December 31, 2020. The Financial Accounting Standards Board ("FASB") issues Accounting Standards Updates ("ASU" or “Update”) and Accounting Standards Codifications (“ASC”), which are the primary source of GAAP.
Recent Accounting Pronouncements	Recent Accounting Pronouncements When RBB conducted its initial public offering (“IPO”) in 2017, we qualified as an emerging growth company (“EGC”). We will remain an EGC until the earliest of (i) the end of the fiscal year during which we have total annual gross revenues of $1.0 billion or more, (ii) the end of the fiscal year following the fifth anniversary of the completion of our IPO, (iii) the date on which we have, during the previous three-year period, issued more than $1.0 billion in non-convertible debt and (iv) the date on which we are deemed to be a “large accelerated filer” under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). We anticipate no longer qualifying as an EGC on January 1, 2023. EGCs are entitled to reduced regulatory and reporting requirements under the Securities Act of 1933, as amended (the “Securities Act”), and the Exchange Act. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). This Update requires an entity to recognize revenue as performance obligations are met, in order to reflect the transfer of promised goods or services to customers in an amount that reflects the consideration the entity is entitled to receive for those goods or services. The following steps are applied in the updated guidance: (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when, or as, the entity satisfies a performance obligation. These amendments are effective for public business entities for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Our revenue is primarily comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income. Accordingly, the majority of the Company’s revenues will not be affected. In addition, the standard does not materially impact the timing or measurement of the Company’s revenue recognition as it is consistent with the Company’s existing accounting for contracts within the scope of the standard. As an EGC, the Company adopted ASU 2014-09 as of January 1, 2019, utilizing the modified prospective approach. The adoption of this ASU did not have a material impact on the Company’s consolidated financial statements, as substantially all of the Company’s revenues are excluded from the scope of the new standard. Since there was no net income impact upon adoption of this ASU, a cumulative effect adjustment to opening retained earnings was not deemed necessary. See Note 20 (Revenue from Contracts with Customers) for more information. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), including subsequent amending ASUs. The most significant change for lessees is the requirement under the new guidance to recognize right-of-use assets and lease liabilities for all leases not considered short-term leases, which is generally defined as a lease term of less than 12 months. This change will result in lessees recognizing right-of-use assets and lease liabilities for most leases currently accounted for as operating leases under current lease accounting guidance. On July 17, 2019, the FASB proposed a one-year deferral of the amendments in this Update to be effective for interim periods beginning after December 15, 2021 and annual periods beginning after December 15, 2020, for an EGC. The Company has several lease agreements which are currently considered operating leases and are therefore not included on the Company’s Consolidated Balance Sheets. Under the new guidance the Company expects that some of the lease agreements will be recognized on the Consolidated Balance Sheets as a right-of-use asset with a corresponding lease liability. Based upon a preliminary evaluation, the Company expects that the ASU will have an impact on the Company’s Consolidated Balance Sheets. As of this Quarterly Report and the Company’s current leases, we estimate the right-of-use asset and lease liability will be in the range of $25-30 million as of the expected January 1, 2021 adoption date. The effective date for this ASU is for years beginning after December 15, 2020, and for interim periods beginning after December 15, 2021. The Company will continue to evaluate how extensive the impact will be under the ASU on the Company’s consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Measurement of Credit Losses on Financial Instrument (Topic 326), including subsequent amending ASUs. This ASU significantly changes how entities will measure credit losses for most financial assets and certain other instruments that aren't measured at fair value through net income. The standard will replace today's "incurred loss" approach with an "expected loss" model. The new model, referred to as the current expected credit loss ("CECL") model, will apply to: (1) financial assets subject to credit losses and measured at amortized cost, and (2) certain off-balance sheet credit exposures. This includes, but is not limited to, loans, leases, held to maturity securities, loan commitments, and financial guarantees. For available for sale (“AFS”) debt securities with unrealized losses, entities will measure credit losses in a manner similar to what they do today, except that the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. ASU 2016-13 also expands the disclosure requirements regarding an entity's assumptions, models, and methods for estimating the allowance for loan and lease losses. In addition, public business entities will need to disclose the amortized cost balance for each class of financial asset by credit quality indicator, disaggregated by the year of origination. ASU 2016-13 was originally proposed to be effective for interim and annual reporting periods for an emerging growth company beginning after December 15, 2020 (however, see below). Entities will apply the standard's provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective (i.e., modified retrospective approach). The Company has begun its evaluation of the impact of the implementation of ASU 2016-13. The implementation of the provisions of ASU 2016-13 will most likely impact the Company’s consolidated financial statements as to the level of reserves that will be required for credit losses. The Company will continue to assess the potential impact that this Update will have on the Company’s consolidated financial statements. In October 2019, the FASB announced a delay in the effective date to January 1, 2023 for an EGC. The Company anticipates adopting this ASU 2016-13 on that date. In February 2019, the U.S. federal bank regulatory agencies approved a final rule modifying their regulatory capital rules and providing an option to phase in over a three year period the day-one adverse regulatory capital effects of ASU 2016-13. Additionally, in March 2020, the U.S. federal bank regulatory agencies issued an interim final rule that provides banking organizations an option to delay the estimated CECL impact on regulatory capital for an additional two years for a total transition period of up to five years to provide regulatory relief to banking organizations to better focus on supporting lending to creditworthy households and businesses in light of recent strains on the U.S. economy as a result of the novel coronavirus disease 2019 ("COVID-19") pandemic. As a result, entities will have the option to gradually phase in the full effect of CECL on regulatory capital over a five-year transition period. In January 2017, the FASB issued ASU 2017-04, Intangibles—Goodwill and Other (Topic 350). This Update simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. The amendments in this Update are required for public business entities and other entities that have goodwill reported in their financial statements and have not elected the private company alternative for the subsequent measurement of goodwill. As a result, under this Update, “an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit.” ASU 2017-04 is effective for annual and any interim impairment tests performed in periods beginning after December 15, 2022 for an EGC. Adoption of ASU 2017-04 is not expected to have a significant impact on the Company’s consolidated financial statements. In March 2017, the FASB issued ASU 2017-08, Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities, which is intended to enhance “the accounting for the amortization of premiums for purchased callable debt securities.” This Update shortens the amortization period for certain callable debt securities purchased at a premium by requiring that the premium be amortized to the earliest call date. Under current GAAP, entities generally amortize the premium as an adjustment of yield over the contractual life of the instrument. The amendments in this Update affects all entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date (that is, at a premium). The amendment does not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The ASU’s amendments are effective for EGC’s for interim periods after December 15, 2020 and annual periods beginning after December 15, 2019. An entity should apply the amendments in this Update on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Additionally, in the period of adoption, an entity should provide disclosures about a change in accounting principle. The implementation of the provisions of ASU 2017-08 will most likely not have a material impact the Company’s consolidated financial statements. The Company will continue to assess the potential impact that this ASU will have on the Company’s consolidated financial statements. In June 2018, the FASB issued ASU 2018-07, Compensation—Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting. The amendments in this Update expand the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. An entity should apply the requirements of Topic 718 to nonemployee awards except for specific guidance on inputs to an option pricing model and the attribution of cost (that is, the period of time over which share-based payment awards vest and the pattern of cost recognition over that period). The amendments specify that Topic 718 applies to all share-based payment transactions in which a grantor acquires goods or services to be used or consumed in a grantor’s own operations by issuing share-based payment awards. The amendments also clarify that Topic 718 does not apply to share-based payments used to effectively provide (1) financing to the issuer or (2) awards granted in conjunction with selling goods or services to customers as part of a contract accounted for under Topic 606, Revenue from Contracts with Customers. For EGCs, the amendments are effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. This Update has the potential to only impact share-based payments to members of the Company’s non-employees. The Company adopted this ASU on January 1, 2020 and this ASU did not have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this Update modify the disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement, based on the concepts in the Concepts Statement, including the consideration of costs and benefits. These disclosure requirements were removed from the topic: (1) The amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, (2) the policy for timing of transfers between levels, and (3) the valuation processes for Level 3 fair value measurements. These disclosure requirements were modified: (1) For investments in certain entities that calculate net asset value, an entity is required to disclose the timing of liquidation of an investee’s assets and the date when restrictions from redemption might lapse only if the investee has communicated the timing to the entity or announced the timing publicly, and (2) the amendments clarify that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date. The following disclosure requirements were added: (1) The changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period, (2) the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. For certain unobservable inputs, an entity may disclose other quantitative information (such as the median or arithmetic average) in lieu of the weighted average if the entity determines that other quantitative information would be a more reasonable and rational method to reflect the distribution of unobservable inputs used to develop Level 3 fair value measurements. In addition, the amendments eliminate “at a minimum” from the phrase “an entity shall disclose at a minimum to promote the appropriate exercise of discretion by entities when considering fair value measurement disclosures and to clarify that materiality is an appropriate consideration of entities and their auditors when evaluating disclosure requirements”. The amendments in this Update are effective for EGCs for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. As an EGC, RBB adopted this Update on January 1, 2020 and it did not have a material impact on the Company’s consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. This Update provides additional guidance to ASU 2015-05, “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement” (CCA), on the accounting for implementation, setup, and other upfront costs (collectively referred to as implementation costs) apply to entities that are a customer in a hosting arrangement. This Update applies to entities that are a customer in a hosting arrangement that is a service contract. Costs for implementation activities in the application development stage are capitalized depending on the nature of the costs, while costs incurred during the preliminary project and post-implementation stages are expensed as the activities are performed. This Update also requires the customer to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement. This Update is effective for an EGC for annual reporting periods beginning after December 15, 2020, and interim periods within annual periods beginning after December 15, 2021. Early adoption of the amendments in this Update is permitted, including adoption in any interim period, for all entities. The amendments in this Update should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. This Update will most likely not have a material impact unless RBB incurs implementation costs for a CCA that is a service contract. In November 2019, the FASB issued ASU 2019-08, Compensation—Stock Compensation (Topic 718) and Revenue from Contracts with Customers (Topic 606), Codification Improvements—Share-Based Consideration Payable to a Customer. This ASU will affect companies that issue share-based payments (e.g., options or warrants) to their customers. In June 2018, the FASB issued ASU 2018-07 that expanded the scope of Topic 718, Compensation—Stock Compensation, to include share-based payments to non-employees in exchange for goods and services. That ASU substantially aligned the accounting for share-based payments to non-employees and employees. However, it required share-based payments to nonemployee customers to be accounted for under Topic 606, Revenue from Contracts with Customers, as a reduction of revenue, similar to other sales incentives (such as coupons and rebates). While that ASU provided guidance on the income statement classification of payments to customers (as a reduction of revenue), that ASU did not specify when to measure such awards or how to classify awards on the balance sheet (for example as a liability or as equity). To address diversity in these areas, the new guidance requires companies to measure and classify (on the balance sheet) share-based payments to customers by applying the guidance in Topic 718. As a result, the amount recorded as a reduction in revenue would be measured based on the grant-date fair value of the share-based payment. ASU 2019-08 is effective for entities that have not yet adopted the amendments in ASU 2018-07, the amendments in ASU 2019-08 are effective for an EGC in fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. RBB adopted the ASU as of December 31, 2019 and this ASU did not have a material impact on the Company’s financial statements as the Company has not issued share-based payments to non-employees, except for non-employee members of the board of directors. In March 2020, the FASB issued ASU 2020-04, "Reference Rate Reform (Topic 848), Facilitation of the Effects of Reference Rate Reform on Financial Reporting," which provides temporary optional expedients to ease the financial reporting burdens of the expected market transition from London Interbank Offered Rate (“LIBOR”) to an alternative reference rate such as Secured Overnight Financing Rate (“SOFR”). The guidance was effective upon issuance and generally can be applied through December 31, 2022. Of the Company’s $2.3 billion in total gross loans as of December 31, 2019, approximately 25% have a LIBOR based reference rate. The Company has several LIBOR based debt issues, refer to Notes 9 and 10 of the Company’s consolidated financial statements included in this Form 10-Q. We are currently evaluating this guidance to determine the date of adoption and the impact on the Company.

Acquisition (Tables) - PGB Holdings, Inc.

3 Months Ended

Mar. 31, 2020

Schedule of Assets Acquired and Liabilities Assumed and Fair Value Adjustments

	PGBH			Fair Value			Fair
(dollars in thousands)	Book Value			Adjustments			Value
Assets acquired
Cash and cash equivalents	$	17,033		$	—		$	17,033
Fed funds sold		8,300			—			8,300
Interest-bearing deposits in other financial Institutions		14,186			—			14,186
Loans, gross		172,443			715			173,158
Allowance for loan losses		(2,265	)		2,265			—
Bank premises and equipment		6,394			1,639			8,033
Core deposit premium		—			491			491
Investment in trust		155			—			155
Other assets		1,687			—			1,687
Total assets acquired	$	217,933		$	5,110		$	223,043

Liabilities assumed
Deposits	$	187,393		$	969		$	188,362
Escrow Payable		4,277			—			4,277
Subordinated debentures		5,155			(763	)		4,392
Deferred income taxes		1,016			1,588			2,604
Other liabilities		1,664			86			1,750
Total liabilities assumed		199,505			1,880			201,385
Excess of assets acquired over liabilities assumed		18,428			3,230			21,658
	$	217,933		$	5,110
Cash paid								32,885
Goodwill recognized							$	11,227

Schedule of Loans Acquired

For loans acquired from PGBH, the contractual amounts due, expected cash flows to be collected, interest component and fair value as of the respective acquisition dates were as follows:

	PGBH Acquired Loans
Contractual amounts due	$	195,227
Cash flows not expected to be collected		5,176
Expected cash flows		190,051
Interest component of expected cash flows		16,893
Fair value of acquired loans	$	173,158

Schedule of Net Interest and Other Income, Net Income and Earnings Per Share

The following table presents the net interest and other income, net income and earnings per share as if the acquisition of PGBH was effective as of January 1, 2020. There were no material, nonrecurring adjustments to the pro forma net interest and other income, net income and earnings per share presented below:

	Three Months Ended March 31, 2020		Three Months Ended March 31, 2019
Net interest and other income	$	28,442	$	32,225
Net income		5,582		10,956
Basic earnings per share		0.28		0.55
Diluted earnings per share		0.28		0.54

Investment Securities (Tables)

3 Months Ended

Mar. 31, 2020

Investments Debt And Equity Securities [Abstract]

Summary of Amortized Cost and Fair Value of Available for Sale Securities and Held to Maturity Securities

			Gross		Gross
(dollars in thousands)	Amortized		Unrealized		Unrealized			Fair
March 31, 2020	Cost		Gains		Losses			Value
Available for sale
Government agency securities	$	1,410	$	16	$	—		$	1,426
SBA agency securities		4,565		87		(5	)		4,647
Mortgage-backed securities- Government sponsored agencies		18,260		520		(8	)		18,772
Collateralized mortgage obligations		11,036		183		—			11,219
Corporate debt securities		90,185		204		(159	)		90,230
Total	$	125,456	$	1,010	$	(172	)	$	126,294

Held to maturity
Municipal taxable securities	$	3,003	$	158	$	—		$	3,161
Municipal securities		4,822		171		—			4,993
Total	$	7,825	$	329	$	—		$	8,154

December 31, 2019
Available for sale
Government agency securities	$	1,591	$	—	$	(19	)	$	1,572
SBA agency securities		4,671		42		(22	)		4,691
Mortgage-backed securities- Government sponsored agencies		19,126		74		(29	)		19,171
Collateralized mortgage obligations		11,641		38		(25	)		11,654
Corporate debt securities		88,700		281		—			88,981
Total	$	125,729	$	435	$	(95	)	$	126,069

Held to maturity
Municipal taxable securities	$	3,505	$	147	$	—		$	3,652
Municipal securities		4,827		153		—			4,980
Total	$	8,332	$	300	$	—		$	8,632

Amortized Cost and Fair Value of Investment Securities Portfolio Expected Maturity

	Less than One Year				More than One Year to Five Years				More than Five Years to Ten Years				More than Ten Years				Total
	Amortized		Estimated		Amortized		Estimated		Amortized		Estimated		Amortized		Estimated		Amortized		Estimated
(dollars in thousands)	Cost		Fair Value		Cost		Fair Value		Cost		Fair Value		Cost		Fair Value		Cost		Fair Value
March 31, 2020
Government agency securities	$	—	$	—	$	1,410	$	1,426	$	—	$	—	$	—	$	—	$	1,410	$	1,426
SBA securities		—		—		656		678		3,909		3,969		—		—		4,565		4,647
Mortgage-backed securities- Government sponsored agencies		3,532		3,566		14,728		15,206		—		—		—		—		18,260		18,772
Collateralized mortgage obligations		—		—		8,855		8,984		2,181		2,235		—		—		11,036		11,219
Corporate debt securities		72,413		72,415		2,002		1,998		11,762		11,937		4,008		3,880		90,185		90,230
Total available for sale	$	75,945	$	75,981	$	27,651	$	28,292	$	17,852	$	18,141	$	4,008	$	3,880	$	125,456	$	126,294

Municipal taxable securities	$	787	$	804	$	1,712	$	1,767	$	504	$	590	$	—	$	—	$	3,003	$	3,161
Municipal securities		—		—		40		40		876		903		3,906		4,050		4,822		4,993
Total held to maturity	$	787	$	804	$	1,752	$	1,807	$	1,380	$	1,493	$	3,906	$	4,050	$	7,825	$	8,154

December 31, 2019
Government agency securities	$	—	$	—	$	1,591	$	1,572	$	—	$	—	$	—	$	—	$	1,591	$	1,572
SBA securities		—		—		714		725		3,957		3,966		—		—		4,671		4,691
Mortgage-backed securities- Government sponsored agencies		3,663		3,679		13,027		13,059		2,436		2,433		—		—		19,126		19,171
Collateralized mortgage obligations		—		—		9,288		9,265		2,353		2,389		—		—		11,641		11,654
Corporate debt securities		70,914		70,919		2,002		2,008		11,772		12,024		4,012		4,030		88,700		88,981
Total available for sale	$	74,577	$	74,598	$	26,622	$	26,629	$	20,518	$	20,812	$	4,012	$	4,030	$	125,729	$	126,069

Municipal taxable securities	$	285	$	289	$	2,716	$	2,784	$	504	$	579	$	—	$	—	$	3,505	$	3,652
Municipal securities		—		—		40		40		366		379		4,421		4,561		4,827		4,980
Total held to maturity	$	285	$	289	$	2,756	$	2,824	$	870	$	958	$	4,421	$	4,561	$	8,332	$	8,632

Summary of Investment Securities With Unrealized Losses

	Less than Twelve Months							Twelve Months or More							Total
(dollars in thousands)	Unrealized Losses			Estimated Fair Value		No. of Issuances		Unrealized Losses			Estimated Fair Value		No. of Issuances		Unrealized Losses			Estimated Fair Value		No. of Issuances
March 31, 2020
SBA securities	$	(5	)	$	1,440		2	$	—		$	—		—	$	(5	)	$	1,440		2
Mortgage-backed securities- Government sponsored agencies		(8	)		1,039		6		—			—		—		(8	)		1,039		6
Corporate debt securities		(159	)		7,971		4		—			—		—		(159	)		7,971		4
Total available for sale	$	(172	)	$	10,450		12	$	—		$	—		—	$	(172	)	$	10,450		12

Municipal securities	$	—		$	—		—	$	—		$	—		—	$	—		$	—		—
Total held to maturity	$	—		$	—		—	$	—		$	—		—	$	—		$	—		—

December 31, 2019
Government agency securities	$	(19	)	$	1,572		2	$	—		$	—		—	$	(19	)	$	1,572		2
SBA securities		(22	)		1,469		2		—			—		—		(22	)		1,469		2
Mortgage-backed securities- Government sponsored agencies		(5	)		2,631		4		(24	)		3,912		6		(29	)		6,543		10
Collateralized mortgage obligations		(10	)		5,738		3		(15	)		953		2		(25	)		6,691		5
Total available for sale	$	(56	)	$	11,410		11	$	(39	)	$	4,865		8	$	(95	)	$	16,275		19

Municipal securities	$	—		$	—		—	$	—		$	—		—	$	—		$	—		—
Total held to maturity	$	—		$	—		—	$	—		$	—		—	$	—		$	—		—

Loans and Allowance for Loan Losses (Tables)

3 Months Ended

Mar. 31, 2020

Receivables [Abstract]

Summary of Balance and Activity Related to Allowance for Loan Losses for Held for Investment Loans and the Recorded Investments in Loans and Impairment method by Portfolio Segment

The following tables present the balance and activity related to the allowance for loan losses for held for investment loans by type for the periods presented.

	Three Months Ended March 31,
	2020													2019
(dollars in thousands)	Real Estate		Commercial			Other		Unallocated			Total			Real Estate		Commercial			Other		Total
Allowance for loan losses:
Beginning balance	$	15,118	$	3,588		$	9	$	101		$	18,816		$	13,437	$	4,140		$	—	$	17,577
Additions (reductions) to the allowance charged to expense		1,273		735			7		(70	)		1,945			952		(405	)		3		550
Charge-offs on loans		—		(631	)		—		—			(631	)		—		—			—		—
Recoveries on loans		—		—			—		—			—			—		109			—		109
Ending balance	$	16,391	$	3,692		$	16	$	31		$	20,130		$	14,389	$	3,844		$	3	$	18,236

	For the year end December 31, 2019
(dollars in thousands)	Real Estate			Commercial			Other		Unallocated		Total
Allowance for loan losses:
Beginning of year	$	13,437		$	4,140		$	—	$	—	$	17,577
Additions (reductions) to the allowance charged to expense		1,847			433			9		101		2,390
Charge-offs on loans		(166	)		(1,093	)		—		—		(1,259	)
Recoveries on loans		—			108			—		—		108
Ending balance	$	15,118		$	3,588		$	9	$	101	$	18,816

(dollars in thousands)
March 31, 2020	Real Estate		Commercial		Other		Unallocated		Total
Reserves:
Specific	$	—	$	—	$	—	$	—	$	—
General		16,391		3,692		16		31		20,130
Total allowance for loan losses	$	16,391	$	3,692	$	16	$	31	$	20,130
Loans evaluated for impairment:
Individually		5,376		14,898		—		—		20,274
Collectively		2,039,968		338,270		1,470		—		2,379,708
Total loans, net of deferred loan fees and unaccreted discount on acquired loans	$	2,045,344	$	353,168	$	1,470	$	—	$	2,399,982

March 31, 2019	Real Estate		Commercial		Unallocated		Total
Reserves:
Specific	$	—	$	11	$	—	$	11
General		14,389		3,833		3		18,225
Total allowance for loan losses		14,389		3,844		3		18,236
Loans evaluated for impairment:
Individually		2,365		221		—		2,586
Collectively		1,765,585		351,906		336		2,117,827
Total loans, net of deferred loan fees and unaccreted discount on acquired loans	$	1,767,950	$	352,127	$	336	$	2,120,413

December 31, 2019	Real Estate		Commercial		Other		Unallocated		Total
Reserves:
Specific	$	—	$	—	$	—	$	—	$	—
General		15,118		3,588		9		101		18,816
Loans acquired with deteriorated credit quality		—		—		—				—
Total allowance for loan losses	$	15,118	$	3,588	$	9	$	101	$	18,816
Loans evaluated for impairment:
Individually	$	3,795	$	9,423	$	—	$	—	$	13,218
Collectively		1,842,747		340,148		821		—		2,183,716
Loans acquired with deteriorated credit quality		—		—		—				—
Total loans, net of deferred loan fees and unaccreted discount on acquired loans	$	1,846,542	$	349,571	$	821	$	—	$	2,196,934

Summary of Risk Category of Loans by Class of Loans

The risk category of loans by class of loans was as follows at March 31, 2020 and December 31, 2019:

(dollars in thousands)			Special
March 31, 2020	Pass		Mention		Substandard		Impaired ⁽¹⁾		Total
Real estate:
Construction and land development	$	119,681	$	—	$	173	$	261	$	120,115
Commercial real estate		804,312		29,073		19,009		2,186		854,580
Single-family residential mortgages		1,066,360		495		865		2,929		1,070,649
Commercial:
Other		261,934		6,080		5,719		1,869		275,602
SBA		59,897		189		4,451		13,029		77,566
Other:		1,470		—		—		—		1,470
Total loans	$	2,313,654	$	35,837	$	30,217	$	20,274	$	2,399,982

(dollars in thousands)			Special
December 31, 2019	Pass		Mention		Substandard		Impaired ⁽¹⁾		Total
Real estate:
Construction and land development	$	95,756	$	—	$	—	$	264	$	96,020
Commercial real estate		767,603		5,353		18,115		2,197		793,268
Single-family residential mortgages		955,327		—		593		1,334		957,254
Commercial:
Other		265,178		4,078		5,330		—		274,586
SBA		61,496		189		3,877		9,423		74,985
Other:		821		—		—		—		821
Total loans	$	2,146,181	$	9,620	$	27,915	$	13,218	$	2,196,934

(1)

Loans, net of deferred fees

Summary of Aging Recorded Investment Past-due Loans

The following table presents the aging of the recorded investment in past-due loans at March 31, 2020 and December 31, 2019 by class of loans:

(dollars in thousands)	30-59		60-89		90 Days		Total		Loans Not		Total		Non- Accrual
March 31, 2020	Days		Days		Or More		Past Due		Past Due		Loans		Loans ⁽¹⁾
Real estate:
Construction and land development	$	—	$	—	$	—	$	—	$	120,115	$	120,115	$	—
Commercial real estate		11,606		—		725		12,331		842,249		854,580		725
Single-family residential mortgages		3,048		2,669		1,813		7,530		1,063,119		1,070,649		2,930
Commercial:
Other		1,554		1,090		1,315		3,959		271,643		275,602		1,363
SBA		2,671		646		12,987		16,304		61,262		77,566		12,987
Other:		74		—		—		74		1,396		1,470		—
	$	18,953	$	4,405	$	16,840	$	40,198	$	2,359,784	$	2,399,982	$	18,005
Real estate:
Single-family residential mortgages held for sale	$	404	$	—	$	—	$	404	$	51,692	$	52,096	$	—

	30-59		60-89		90 Days		Total		Loans Not		Total		Non- Accrual
December 31, 2019	Days		Days		Or More		Past Due		Past Due		Loans		Loans ⁽¹⁾
Real estate:
Construction and land development	$	—	$	—	$	—	$	—	$	96,020	$	96,020	$	—
Commercial real estate		—		—		725		725		792,543		793,268		725
Single-family residential mortgages		1,454		1,560		450		3,464		953,790		957,254		1,334
Commercial:
Other		—		—		—		—		274,586		274,586		—
SBA		2,263		—		9,378		11,641		63,344		74,985		9,378
Other:		—		—		—		—		821		821		—
	$	3,717	$	1,560	$	10,553	$	15,830	$	2,181,104	$	2,196,934	$	11,437
Real estate:
Single-family residential mortgages held for sale	$	—	$	—	$	—	$	—	$	108,194	$	108,194	$	—

(1)

Included in total loans.

Summary of Individually Impaired Loans Presented by Class of Loans

Information relating to individually impaired loans presented by class of loans was as follows at March 31, 2020 and December 31, 2019:

(dollars in thousands)	Principal		Recorded		Related
March 31, 2020	Balance		Investment		Allowance
With no related allowance recorded
Construction and land development	$	261	$	261	$	—
Commercial and industrial		1,881		1,869
Commercial real estate		2,186		2,186		—
Residential mortgage loans		2,965		2,929		—
Commercial – SBA		13,039		13,029		—
With related allowance recorded
Commercial and industrial		—		—		—
Single-family residential mortgage		—		—		—
Total	$	20,332	$	20,274	$	—

(dollars in thousands)	Principal		Recorded		Average		Interest		Related
December 31, 2019	Balance		Investment		Balance		Income		Allowance
With no related allowance recorded
Construction and land development	$	264	$	264	$	271	$	24	$	—
Commercial real estate		2,198		2,197		2,384		100		—
Residential mortgage loans		1,349		1,334		1,351		—		—
Commercial – SBA		9,423		9,423		10,791		4		—
With related allowance recorded
Commercial – SBA		—		—		—		—		—
Total	$	13,234	$	13,218	$	14,797	$	128	$	—

Summary of Impaired Loans and Leases

The following table presents information on impaired loans and leases, disaggregated by loan segment, for the periods indicated:

	Three Months Ended
	March 31, 2020				March 31, 2019
	Average		Interest		Average		Interest
(dollars in thousands)	Balance		Income		Balance		Income
With no related allowance recorded
Construction and land development	$	262	$	2	$	275	$	6
Commercial and industrial		1,987		9		—		—
Commercial real estate		2,423		25		2,100		17
Residential mortgage loans		2,962		—		—		—
Commercial – SBA		15,153		1		56		1
With related allowance recorded
Commercial - SBA		—		—		166		—
	$	22,787	$	37	$	2,597	$	24

Summary of Loans by Class Modified as TDRs

Pre-

Post-

Modification

(dollars in thousands)

Number of

Recorded

March 31, 2020

Loans

Investment

Commercial and industrial

506

Total

506

Loan Servicing (Tables)

3 Months Ended

Mar. 31, 2020

Loan Servicing [Abstract]

Schedule of Principal Balances of Mortgage and SBA Loans Serviced for Others

Mortgage and SBA loans serviced for others are not reported as assets. The principal balances at March 31, 2020 and December 31, 2019 are as follows:

	March 31,		December 31,
(dollars in thousands)	2020		2019
Loans serviced for others:
Mortgage loans	$	1,673,304	$	1,683,298
SBA loans	$	156,750	$	170,849
Commercial real estate loans	$	4,199	$	4,216

Schedule of Amortization of Mortgage Servicing Rights Netted Against Loan Servicing Fee Income

The amortization of mortgage servicing rights is netted against loan servicing fee income.

	Three Months Ended						Three Months Ended
	March 31, 2020						March 31, 2019
	Mortgage			SBA			Mortgage			SBA
(dollars in thousands)	Loans			Loans			Loans			Loans
Servicing assets:
Beginning of period	$	12,997		$	4,086		$	12,858		$	4,512
Additions		789			38			604			112
Disposals		(343	)		(217	)		(33	)		(127	)
Amortized to expense		(382	)		(142	)		(466	)		(172	)
End of period	$	13,061		$	3,765		$	12,963		$	4,325

Goodwill and Intangibles (Tables)

3 Months Ended

Mar. 31, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Future Estimated Amortization Expense

Estimated CDI amortization expense for future years is as follows:

(dollars in thousands)
As of March 31:
Remainder of 2020	$	1,037
2021		1,121
2022		936
2023		800
2024		683
Thereafter		1,657
Total	$	6,234

Deposits (Tables)

3 Months Ended

Mar. 31, 2020

Maturities Of Time Deposits [Abstract]

Schedule of Maturities of Time Deposits

At March 31, 2020, the scheduled maturities of time deposits are as follows:

(dollars in thousands)	March 31, 2020
One year	$	1,267,249
Two to three years		76,236
Over three years		16,301
Total	$	1,359,786

Long-term Debt (Tables)

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Schedule of Long-term Debt

At March 31, 2020 and December 31, 2019, long-term debt was as follows:

	March 31,		December 31,
(dollars in thousands)	2020		2019
Principal	$	105,000	$	105,000
Unamortized debt issuance costs	$	865	$	951

Schedule of Interest and Amortization Expense

The following table presents interest and amortization expense the Company incurred for the three months ended March 31, 2020 and 2019:

	For the Three Months Ended March 31,
(dollars in thousands)	2020		2019
Interest Expense:
Interest	$	1,662	$	1,662
Amortization		86		85

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

Commitments (Tables)

3 Months Ended

Mar. 31, 2020

Commitments And Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rent Payments on Company's Leases

Future minimum rent payments on the Company’s leases were as follows at March 31, 2020:

(dollars in thousands)
Year ending December 31:
2020 remaining	$	4,241
2021		4,751
2022		4,284
2023		3,322
2024		2,224
Thereafter		9,016
Total	$	27,838

Schedule of Financial Commitments whose Contractual Amount Represents Credit Risk

At March 31, 2020 and December 31, 2019, the Company had the following financial commitments whose contractual amount represents credit risk:

	March 31,		December 31,
(dollars in thousands)	2020		2019
Commitments to extend credit	$	387,248	$	326,126
Commercial and similar letters of credit		227		358
Standby letters of credit		3,963		3,715
Total	$	391,438	$	330,199

Related Party Transactions (Tables)

3 Months Ended

Mar. 31, 2020

Schedule of Related Party Transactions

Loans to principal officers, directors, and their affiliates were as follows:

	March 31,			December 31,
(dollars in thousands)	2020			2019
Beginning balance	$	4,000		$	3,600
New loans and advances		4,000			16,180
Repayments		(4,000	)	$	(15,780	)
Ending balance	$	4,000		$	4,000

Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Weighted Average Assumption for Fair Value of Option Grant Estimated Using Black-Scholes Option Pricing Model

The fair value of each option grant was estimated on the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions presented below for 2020 and 2019.

	2020			2019
Expected volatility		28.5	%		35.0	%
Expected term	6.0 years			6.0 years
Expected dividends		1.99	%		1.90	%
Risk free rate		1.31	%		2.66	%
Grant date fair value	$	4.61		$	6.32

Summary of Awards Pursuant to Stock Option Plans

A summary of the status of awards pursuant to the Company's stock option plans as of March 31, 2020 and changes during the three months ended ended is presented below:

						Weighted-
				Weighted-		Average
				Average		Remaining	Aggregate
				Exercise		Contractual	Intrinsic
(dollars in thousands, except for share amounts)	Shares			Price		Term	Value
Outstanding at beginning of year		1,090,968		$	13.11
Granted		51,000			20.10
Exercised		(56,498	)		12.61
Forfeited/cancelled		(4,000	)		18.38
Outstanding at end of year		1,081,470		$	13.45	4.10 years	$	1,826

Options exercisable		982,470		$	12.87	3.57 years	$	1,826

Regulatory Matters (Tables)

3 Months Ended

Mar. 31, 2020

Banking And Thrift [Abstract]

Summary of Company and Bank Continue to Exceed Regulatory Capital Minimum Requirements and Bank Continues to Exceed Well Capitalized Standards

						Amount of Capital Required
											Minimum Required Plus					To Be Well-
						Minimum Required					Capital					Capitalized
	Actual					for Capital Adequacy Purposes					Conservation Buffer Fully Phased-In					Under Prompt Corrective Provisions
(dollars in thousands)	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
As of March 31, 2020:
Tier 1 Leverage Ratio
Consolidated	$	347,133		11.74	%	NA		NA			NA		NA			NA		NA
Bank		426,236		14.44	%	$	118,042		4.0	%	$	118,042		4.0	%	$	147,552		5.0	%
Common Equity Tier 1 Risk- Based Capital Ratio
Consolidated		333,013		15.45	%	NA		NA			NA		NA			NA		NA
Bank		426,236		19.79	%		96,911		4.5	%		150,750		7.0	%		139,982		6.5	%
Tier 1 Risk-Based Capital Ratio
Consolidated		347,133		16.10	%	NA		NA			NA		NA			NA		NA
Bank		426,236		19.79	%		129,214		6.0	%		183,054		8.5	%		172,286		8.0	%
Total Risk-Based Capital Ratio
Consolidated		472,376		21.91	%	NA		NA			NA		NA			NA		NA
Bank		447,344		20.77	%		172,286		8.0	%		226,125		10.5	%		215,357		10.0	%

						Amount of Capital Required
											Minimum Required Plus					To Be Well-
						Minimum Required for Capital Adequacy					Capital Conservation Buffer					Capitalized Under Prompt Corrective
	Actual					Purposes					Fully Phased-In					Provisions
(dollars in thousands)	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
As of December 31, 2019:
Tier 1 Leverage Ratio
Consolidated	$	353,572		12.89	%	NA		NA			NA		NA			NA		NA
Bank		417,036		15.23	%	$	108,150		4.0	%	$	108,150		4.0	%	$	135,187		5.0	%
Common Equity Tier 1 Risk- Based Capital Ratio
Consolidated		343,899		17.16	%	NA		NA			NA		NA			NA		NA
Bank		417,036		20.87	%		89,127		4.5	%		138,642		7.0	%		128,739		6.5	%
Tier 1 Risk-Based Capital Ratio
Consolidated		353,572		17.65	%	NA		NA			NA		NA			NA		NA
Bank		417,036		20.87	%		118,836		6.0	%		168,351		8.5	%		158,448		8.0	%
Total Risk-Based Capital Ratio
Consolidated		477,262		23.82	%	NA		NA			NA		NA			NA		NA
Bank		436,677		21.86	%		158,448		8.0	%		207,964		10.5	%		198,061		10.0	%

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of Hierarchy and Fair Value for Each Major Category of Assets and Liabilities Measured at Fair Value

The following table provides the hierarchy and fair value for each major category of assets and liabilities measured at fair value at March 31, 2020 and December 31, 2019:

(dollars in thousands)	Fair Value Measurements Using:
March 31, 2020	Level 1		Level 2		Level 3		Total
Assets measured at fair value:
On a recurring basis:
Securities available for sale
Government agency securities	$	—	$	1,426	$	—	$	1,426
SBA agency securities		—		4,647		—		4,647
Mortgage-backed securities		—		18,772		—		18,772
Collateralized mortgage obligations		—		11,219		—		11,219
Corporate debt securities		—		90,230		—		90,230
	$	—	$	126,294	$	—	$	126,294

On a non-recurring basis:
Commercial real estate - collateral dependent impaired loans	$	—	$	—	$	3,608	$	3,608
Other real estate owned		—		—		293		293
	$	—	$	—	$	3,901	$	3,901

December 31, 2019	Level 1		Level 2		Level 3		Total
Assets measured at fair value:
On a recurring basis:
Securities available for sale
Government agency securities	$	—	$	1,572	$	—	$	1,572
SBA agency securities		—		4,691		—		4,691
Mortgage-backed securities		—		19,171		—		19,171
Collateralized mortgage obligations		—		11,654		—		11,654
Commercial paper		—		69,898		—		69,898
Corporate debt securities		—		19,083		—		19,083
	$	—	$	126,069	$	—	$	126,069

On a non-recurring basis:
Other real estate owned	$	—	$	—	$	293	$	293

Summary of Quantitative Information About Impaired Loans and OREO Non-recurring Level 3 Fair Value Measurements

Quantitative information about the Company's impaired loans and OREO non-recurring Level 3 fair value measurements at March 31, 2020 and December 31, 2019 is as follows:


(dollars in thousands)	Fair Value		Valuation	Unobservable	Adjustment
March 31, 2020	Amount		Technique	Input	Range
Collateral dependent impaired loans - commercial real estate	$	3,608	Third Party Appraisals	Management Adjustments to Reflect Current Conditions and Selling Costs	5% - 6%
Other real estate owned	$	293	Third Party Appraisals	Management Adjustments to Reflect Current Conditions and Selling Costs	5%-6%
December 31, 2019
Other real estate owned	$	293	Third Party	Management Adjustments	5%-6%
			Appraisals	to Reflect Current
				Conditions and Selling
				Costs

- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

+ References + Details

Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of Fair Value Hierarchy Level and Estimated Fair Value of Significant Financial Instruments

The fair value hierarchy level and estimated fair value of significant financial instruments at March 31, 2020 and December 31, 2019 are summarized as follows:

		March 31,				December 31,
		2020				2019
	Fair Value	Carrying		Fair		Carrying		Fair
(dollars in thousands)	Hierarchy	Value		Value		Value		Value
Financial Assets:
Cash and due from banks	Level 1	$	285,667	$	285,667	$	114,763	$	114,763
Federal funds sold and other cash equivalents	Level 1		75,300		75,300		67,000		67,000
Interest-earning deposits in other financial institutions	Level 1		600		600		600		600
Investment securities - AFS	Level 2		126,294		126,294		126,069		126,069
Investment securities - HTM	Level 2		7,825		8,154		8,332		8,632
Mortgage loans held for sale	Level 1		52,096		52,664		108,194		109,385
Loans, net	Level 3		2,379,852		2,325,638		2,178,118		2,158,970
Equity security	Level 3		11,817		11,817		11,826		11,826
Mortgage serving rights	Level 2		16,826		17,251		17,083		20,752

Financial Liabilities:
Deposits	Level 2	$	2,435,981	$	2,427,037	$	2,248,938	$	2,236,329
FHLB advances	Level 2		150,000		150,000		—		—
Long-term debt	Level 2		104,135		131,284		104,049		109,877
Subordinated debentures	Level 3		14,120		20,902		9,673		11,709

Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Reconciliation of Net Income and Shares Outstanding to Income and Number of Shares Used to Compute EPS

The following is a reconciliation of net income and shares outstanding to the income and number of shares used to compute earnings per share (“EPS”):

	For the Three Months Ended March 31,
	2020					2019
(dollars in thousands except per share amounts)	Income			Shares		Income			Shares
Net income as reported	$	6,748				$	10,380
Less: Earnings allocated to participating securities		(10	)				(22	)
Shares outstanding					19,739,280					20,073,991
Impact of weighting shares					232,576					(69,700	)
Used in basic EPS		6,738			19,971,856		10,358			20,004,291
Dilutive effect of outstanding
Stock options					294,472					389,025
Used in dilutive EPS	$	6,738			20,266,328	$	10,358			20,393,316

Basic earnings per common share	$	0.34				$	0.52
Diluted earnings per common share		0.33					0.51

Revenue From Contracts With Customers (Tables)

3 Months Ended

Mar. 31, 2020

Revenue From Contract With Customer [Abstract]

Summary of Revenue From Contracts With Customers in-Scope and Not in-Scope under Topic 606

The following is a summary of revenue from contracts with customers that are in-scope and not in-scope under Topic 606:

	For the Three Months Ended March 31,
(dollars in thousands)	2020		2019
Non-interest income, in scope ⁽¹⁾
Fees and service charges on deposit accounts	$	451	$	298
Other fees ⁽²⁾		149		198
Other income ⁽³⁾		452		291
Total in-scope non-interest income		1,052		787
Non-interest income, not in scope ⁽⁴⁾		3,563		3,415
Total non-interest income	$	4,615	$	4,202

(1)

There were no adjustments to the Company's financial statements recorded as a result of the adoption of ASC 606.

(2)

Other fees consists of wealth management fees, miscellaneous loan fees and postage/courier fees.

(3)

Other income consists of safe deposit box rental income, wire transfer fees, security brokerage fees, annuity sales, insurance activity and OREO income.

(4)

Business Description - Additional Information (Details) $ in Thousands	3 Months Ended	105 Months Ended
	Mar. 31, 2020 USD ($) Branch	Mar. 31, 2020 USD ($) Acquisition Branch	Dec. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Description Of Business [Line Items]
Total consolidated assets	$ 3,128,653	$ 3,128,653	$ 2,788,535
Gross consolidated loans held for investment and held for sale	2,500,000
Total consolidated deposits	2,435,981	2,435,981	2,248,938
Total consolidated stockholders' Equity	$ 407,993	$ 407,993	$ 407,690	$ 384,803	$ 374,621
Number of acquisitions \| Acquisition		6
PGB Holdings, Inc. \| Illinois
Description Of Business [Line Items]
Number of branches operated \| Branch	3	3

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Total gross loans		$ 2,300
Percentage of gross loans with LIBOR based reference rate		25.00%
Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Right-of-use asset	$ 25
Lease liability	25
Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Right-of-use asset	30
Lease liability	$ 30

Acquisition - Additional Information (Details) $ in Thousands	Jan. 10, 2020 USD ($) Branch	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Business Acquisition [Line Items]
Goodwill		$ 69,790	$ 58,563
PGB Holdings, Inc.
Business Acquisition [Line Items]
Business acquisition, date	Jan. 10, 2020
Cash consideration	$ 32,885
Goodwill	$ 11,227
PGB Holdings, Inc. \| Illinois
Business Acquisition [Line Items]
Number of branches operated \| Branch	3

Acquisition - Schedule of Assets Acquired and Liabilities Assumed and Fair Value Adjustments (Details) - USD ($) $ in Thousands	Jan. 10, 2020	Mar. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill recognized		$ 69,790	$ 58,563
PGB Holdings, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents	$ 17,033
Fed funds sold	8,300
Interest-bearing deposits in other financial Institutions	14,186
Loans, gross	173,158
Bank premises and equipment	8,033
Core deposit premium	491
Investment in trust	155
Other assets	1,687
Total assets acquired	223,043
Deposits	188,362
Escrow Payable	4,277
Subordinated debentures	4,392
Deferred income taxes	2,604
Other liabilities	1,750
Total liabilities assumed	201,385
Excess of assets acquired over liabilities assumed	21,658
Cash paid	32,885
Goodwill recognized	11,227
PGB Holdings, Inc. \| Book Value
Business Acquisition [Line Items]
Cash and cash equivalents	17,033
Fed funds sold	8,300
Interest-bearing deposits in other financial Institutions	14,186
Loans, gross	172,443
Allowance for loan losses	(2,265)
Bank premises and equipment	6,394
Investment in trust	155
Other assets	1,687
Total assets acquired	217,933
Deposits	187,393
Escrow Payable	4,277
Subordinated debentures	5,155
Deferred income taxes	1,016
Other liabilities	1,664
Total liabilities assumed	199,505
Excess of assets acquired over liabilities assumed	18,428
Business combination, Recognized identifiable assets acquired and liabilities assumed, net	217,933
PGB Holdings, Inc. \| Fair Value Adjustments
Business Acquisition [Line Items]
Loans, gross	715
Allowance for loan losses	2,265
Bank premises and equipment	1,639
Core deposit premium	491
Total assets acquired	5,110
Deposits	969
Subordinated debentures	(763)
Deferred income taxes	1,588
Other liabilities	86
Total liabilities assumed	1,880
Excess of assets acquired over liabilities assumed	3,230
Business combination, Recognized identifiable assets acquired and liabilities assumed, net	$ 5,110

Acquisition - Schedule of Loans Acquired (Details) - PGB Holdings, Inc. $ in Thousands	Jan. 10, 2020 USD ($)
Business Acquisition [Line Items]
Contractual amounts due	$ 195,227
Cash flows not expected to be collected	5,176
Expected cash flows	190,051
Interest component of expected cash flows	16,893
Fair value of acquired loans	$ 173,158

Acquisition - Schedule of Net Interest and Other Income, Net Income and Earnings Per Share (Details) - PGB Holdings, Inc. - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Business Acquisition [Line Items]
Net interest and other income	$ 28,442	$ 32,225
Net income	$ 5,582	$ 10,956
Basic earnings per share	$ 0.28	$ 0.55
Diluted earnings per share	$ 0.28	$ 0.54

Investment Securities - Summary of Amortized Cost and Fair Value of Available for Sale Securities and Held to Maturity Securities - (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available for sale, Amortized Cost	$ 125,456	$ 125,729
Available for sale, Gross Unrealized Gains	1,010	435
Available for sale, Gross Unrealized Losses	(172)	(95)
Available for sale, Fair Value	126,294	126,069
Held to maturity, Amortized Cost	7,825	8,332
Held to maturity, Gross Unrealized Gains	329	300
Securities held to maturity, fair value	8,154	8,632
Government Agency Securities
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available for sale, Amortized Cost	1,410	1,591
Available for sale, Gross Unrealized Gains	16
Available for sale, Gross Unrealized Losses		(19)
Available for sale, Fair Value	1,426	1,572
SBA Agency Securities
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available for sale, Amortized Cost	4,565	4,671
Available for sale, Gross Unrealized Gains	87	42
Available for sale, Gross Unrealized Losses	(5)	(22)
Available for sale, Fair Value	4,647	4,691
Mortgage-Backed Securities - Government Sponsored Agencies
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available for sale, Amortized Cost	18,260	19,126
Available for sale, Gross Unrealized Gains	520	74
Available for sale, Gross Unrealized Losses	(8)	(29)
Available for sale, Fair Value	18,772	19,171
Collateralized Mortgage Obligations
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available for sale, Amortized Cost	11,036	11,641
Available for sale, Gross Unrealized Gains	183	38
Available for sale, Gross Unrealized Losses		(25)
Available for sale, Fair Value	11,219	11,654
Corporate Debt Securities
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available for sale, Amortized Cost	90,185	88,700
Available for sale, Gross Unrealized Gains	204	281
Available for sale, Gross Unrealized Losses	(159)
Available for sale, Fair Value	90,230	88,981
Municipal Taxable Securities
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Held to maturity, Amortized Cost	3,003	3,505
Held to maturity, Gross Unrealized Gains	158	147
Securities held to maturity, fair value	3,161	3,652
Municipal Securities
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Held to maturity, Amortized Cost	4,822	4,827
Held to maturity, Gross Unrealized Gains	171	153
Securities held to maturity, fair value	$ 4,993	$ 4,980

Investment Securities - Additional Information (Details)	Mar. 31, 2020 USD ($) Security	Dec. 31, 2019 USD ($) Security
Investments Debt And Equity Securities [Abstract]
Number of investment securities pledged as collateral \| Security	1	1
Fair value of securities pledged to secure local agency deposit \| $	$ 608,000	$ 627,000

Investment Securities - Amortized Cost and Fair Value of Investment Securities Portfolio Expected Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Less than one year, Available for sale, Amortized Cost	$ 75,945	$ 74,577
More than one year to five years, Available for sale, Amortized Cost	27,651	26,622
More than five years to ten years, Available for sale, Amortized Cost	17,852	20,518
More than ten years, Available for sale, Amortized Cost	4,008	4,012
Available for sale, Amortized Cost	125,456	125,729
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Less than one year, Available for sale, Estimated Fair Value	75,981	74,598
More than one year, Available for sale, Estimated Fair Value	28,292	26,629
More than five years to ten years, Available for sale, Estimated Fair Value	18,141	20,812
More than ten years, Available for sale, Estimated Fair Value	3,880	4,030
Available for sale, Estimated Fair value	126,294	126,069
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]
Less than one year, Held to Maturity, Amortized Cost	787	285
More than one year to five years, Held to Maturity, Amortized Cost	1,752	2,756
More than five years to ten years, Held to Maturity, Amortized Cost	1,380	870
More than ten years, Held to Maturity, Amortized Cost	3,906	4,421
Held to maturity, Amortized Cost	7,825	8,332
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Less than one year, Held to Maturity, Estimated Fair Value	804	289
More than one year to five years, Held to Maturity, Estimated Fair Value	1,807	2,824
More than five years to ten years, Held to Maturity, Estimated Fair Value	1,493	958
More than ten years, Held to Maturity,Estimated Fair Value	4,050	4,561
Held to Maturity, Estimated Fair Value	8,154	8,632
Government Agency Securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
More than one year to five years, Available for sale, Amortized Cost	1,410	1,591
Available for sale, Amortized Cost	1,410	1,591
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
More than one year, Available for sale, Estimated Fair Value	1,426	1,572
Available for sale, Estimated Fair value	1,426	1,572
Mortgage-Backed Securities - Government Sponsored Agencies
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Less than one year, Available for sale, Amortized Cost	3,532	3,663
More than one year to five years, Available for sale, Amortized Cost	14,728	13,027
More than five years to ten years, Available for sale, Amortized Cost		2,436
Available for sale, Amortized Cost	18,260	19,126
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Less than one year, Available for sale, Estimated Fair Value	3,566	3,679
More than one year, Available for sale, Estimated Fair Value	15,206	13,059
More than five years to ten years, Available for sale, Estimated Fair Value		2,433
Available for sale, Estimated Fair value	18,772	19,171
Collateralized Mortgage Obligations
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
More than one year to five years, Available for sale, Amortized Cost	8,855	9,288
More than five years to ten years, Available for sale, Amortized Cost	2,181	2,353
Available for sale, Amortized Cost	11,036	11,641
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
More than one year, Available for sale, Estimated Fair Value	8,984	9,265
More than five years to ten years, Available for sale, Estimated Fair Value	2,235	2,389
Available for sale, Estimated Fair value	11,219	11,654
Corporate Debt Securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Less than one year, Available for sale, Amortized Cost	72,413	70,914
More than one year to five years, Available for sale, Amortized Cost	2,002	2,002
More than five years to ten years, Available for sale, Amortized Cost	11,762	11,772
More than ten years, Available for sale, Amortized Cost	4,008	4,012
Available for sale, Amortized Cost	90,185	88,700
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Less than one year, Available for sale, Estimated Fair Value	72,415	70,919
More than one year, Available for sale, Estimated Fair Value	1,998	2,008
More than five years to ten years, Available for sale, Estimated Fair Value	11,937	12,024
More than ten years, Available for sale, Estimated Fair Value	3,880	4,030
Available for sale, Estimated Fair value	90,230	88,981
Municipal Taxable Securities
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]
Less than one year, Held to Maturity, Amortized Cost	787	285
More than one year to five years, Held to Maturity, Amortized Cost	1,712	2,716
More than five years to ten years, Held to Maturity, Amortized Cost	504	504
Held to maturity, Amortized Cost	3,003	3,505
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Less than one year, Held to Maturity, Estimated Fair Value	804	289
More than one year to five years, Held to Maturity, Estimated Fair Value	1,767	2,784
More than five years to ten years, Held to Maturity, Estimated Fair Value	590	579
Held to Maturity, Estimated Fair Value	3,161	3,652
Municipal Securities
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]
More than one year to five years, Held to Maturity, Amortized Cost	40	40
More than five years to ten years, Held to Maturity, Amortized Cost	876	366
More than ten years, Held to Maturity, Amortized Cost	3,906	4,421
Held to maturity, Amortized Cost	4,822	4,827
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
More than one year to five years, Held to Maturity, Estimated Fair Value	40	40
More than five years to ten years, Held to Maturity, Estimated Fair Value	903	379
More than ten years, Held to Maturity,Estimated Fair Value	4,050	4,561
Held to Maturity, Estimated Fair Value	4,993	4,980
SBA Securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
More than one year to five years, Available for sale, Amortized Cost	656	714
More than five years to ten years, Available for sale, Amortized Cost	3,909	3,957
Available for sale, Amortized Cost	4,565	4,671
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
More than one year, Available for sale, Estimated Fair Value	678	725
More than five years to ten years, Available for sale, Estimated Fair Value	3,969	3,966
Available for sale, Estimated Fair value	$ 4,647	$ 4,691

Investment Securities - Summary of Investment Securities With Unrealized Losses (Details) $ in Thousands	Mar. 31, 2020 USD ($) Security	Dec. 31, 2019 USD ($) Security
Schedule Of Available For Sale Securities [Line Items]
Less than Twelve Months Unrealized Losses	$ (172)	$ (56)
Less than Twelve Months Estimated Fair Value	$ 10,450	$ 11,410
Less than Twelve Months No. of Issuances \| Security	12	11
Twelve Months or More Unrealized Losses		$ (39)
Twelve Months or More Estimated Fair Value		$ 4,865
Twelve Months or More No. of Issuances \| Security		8
Total Unrealized Losses	$ (172)	$ (95)
Total Estimated Fair Value	$ 10,450	$ 16,275
Available for sale, Total No. of Issuances \| Security	12	19
SBA Securities
Schedule Of Available For Sale Securities [Line Items]
Less than Twelve Months Unrealized Losses	$ (5)	$ (22)
Less than Twelve Months Estimated Fair Value	$ 1,440	$ 1,469
Less than Twelve Months No. of Issuances \| Security	2	2
Total Unrealized Losses	$ (5)	$ (22)
Total Estimated Fair Value	$ 1,440	$ 1,469
Available for sale, Total No. of Issuances \| Security	2	2
Government Agency Securities
Schedule Of Available For Sale Securities [Line Items]
Less than Twelve Months Unrealized Losses		$ (19)
Less than Twelve Months Estimated Fair Value		$ 1,572
Less than Twelve Months No. of Issuances \| Security		2
Total Unrealized Losses		$ (19)
Total Estimated Fair Value		$ 1,572
Available for sale, Total No. of Issuances \| Security		2
Mortgage-Backed Securities - Government Sponsored Agencies
Schedule Of Available For Sale Securities [Line Items]
Less than Twelve Months Unrealized Losses	$ (8)	$ (5)
Less than Twelve Months Estimated Fair Value	$ 1,039	$ 2,631
Less than Twelve Months No. of Issuances \| Security	6	4
Twelve Months or More Unrealized Losses		$ (24)
Twelve Months or More Estimated Fair Value		$ 3,912
Twelve Months or More No. of Issuances \| Security		6
Total Unrealized Losses	$ (8)	$ (29)
Total Estimated Fair Value	$ 1,039	$ 6,543
Available for sale, Total No. of Issuances \| Security	6	10
Corporate Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Less than Twelve Months Unrealized Losses	$ (159)
Less than Twelve Months Estimated Fair Value	$ 7,971
Less than Twelve Months No. of Issuances \| Security	4
Total Unrealized Losses	$ (159)
Total Estimated Fair Value	$ 7,971
Available for sale, Total No. of Issuances \| Security	4
Collateralized Mortgage Obligations
Schedule Of Available For Sale Securities [Line Items]
Less than Twelve Months Unrealized Losses		$ (10)
Less than Twelve Months Estimated Fair Value		$ 5,738
Less than Twelve Months No. of Issuances \| Security		3
Twelve Months or More Unrealized Losses		$ (15)
Twelve Months or More Estimated Fair Value		$ 953
Twelve Months or More No. of Issuances \| Security		2
Total Unrealized Losses		$ (25)
Total Estimated Fair Value		$ 6,691
Available for sale, Total No. of Issuances \| Security		5

Loans and Allowance for Loan Losses - Summary of Balance and Activity Related to Allowance for Loan Losses for Held for Investment Loans (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Allowance for loan losses:
Allowance for loan losses, Beginning balance	$ 18,816	$ 17,577	$ 17,577
Allowance of loan losses, Additions (reductions) to the allowance charged to expense	1,945	550	2,390
Allowance for loan losses, Charge-offs on loans	(631)		(1,259)
Allowance for loan losses, Recoveries on loans		109	108
Allowance for loan losses, Ending balance	20,130	18,236	18,816
Real Estate
Allowance for loan losses:
Allowance for loan losses, Beginning balance	15,118	13,437	13,437
Allowance of loan losses, Additions (reductions) to the allowance charged to expense	1,273	952	1,847
Allowance for loan losses, Charge-offs on loans			(166)
Allowance for loan losses, Ending balance	16,391	14,389	15,118
Commercial
Allowance for loan losses:
Allowance for loan losses, Beginning balance	3,588	4,140	4,140
Allowance of loan losses, Additions (reductions) to the allowance charged to expense	735	(405)	433
Allowance for loan losses, Charge-offs on loans	(631)		(1,093)
Allowance for loan losses, Recoveries on loans		109	108
Allowance for loan losses, Ending balance	3,692	3,844	3,588
Other
Allowance for loan losses:
Allowance for loan losses, Beginning balance	9
Allowance of loan losses, Additions (reductions) to the allowance charged to expense	7	3	9
Allowance for loan losses, Ending balance	16	$ 3	9
Unallocated
Allowance for loan losses:
Allowance for loan losses, Beginning balance	101
Allowance of loan losses, Additions (reductions) to the allowance charged to expense	(70)		101
Allowance for loan losses, Ending balance	$ 31		$ 101

Loans and Allowance for Loan Losses - Summary of Recorded Investment in Loans Impairment Method and Activity in Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Reserves:
Loan losses, Reserves	$ 20,130	$ 18,816	$ 18,236
Loans evaluated for impairment:
Loans, Individually evaluated for impairment	20,274	13,218	2,586
Loans, Collectively evaluated for impairment	2,379,708	2,183,716	2,117,827
Loans acquired		2,300,000
Total loans, net of deferred loan fees	2,399,982	2,196,934	2,120,413
Specific Reserves
Reserves:
Loan losses, Reserves			11
General Reserves
Reserves:
Loan losses, Reserves	20,130	18,816	18,225
Real Estate
Reserves:
Loan losses, Reserves	16,391	15,118	14,389
Loans evaluated for impairment:
Loans, Individually evaluated for impairment	5,376	3,795	2,365
Loans, Collectively evaluated for impairment	2,039,968	1,842,747	1,765,585
Total loans, net of deferred loan fees	2,045,344	1,846,542	1,767,950
Real Estate \| General Reserves
Reserves:
Loan losses, Reserves	16,391	15,118	14,389
Commercial
Reserves:
Loan losses, Reserves	3,692	3,588	3,844
Loans evaluated for impairment:
Loans, Individually evaluated for impairment	14,898	9,423	221
Loans, Collectively evaluated for impairment	338,270	340,148	351,906
Total loans, net of deferred loan fees	353,168	349,571	352,127
Commercial \| Specific Reserves
Reserves:
Loan losses, Reserves			11
Commercial \| General Reserves
Reserves:
Loan losses, Reserves	3,692	3,588	3,833
Other
Reserves:
Loan losses, Reserves	16	9
Loans evaluated for impairment:
Loans, Collectively evaluated for impairment	1,470	821
Total loans, net of deferred loan fees	1,470	821
Other \| General Reserves
Reserves:
Loan losses, Reserves	16	9
Unallocated
Reserves:
Loan losses, Reserves	31	101	3
Loans evaluated for impairment:
Loans, Collectively evaluated for impairment			336
Total loans, net of deferred loan fees			336
Unallocated \| General Reserves
Reserves:
Loan losses, Reserves	$ 31	$ 101	$ 3

Loans and Allowance for Loan Losses - Summary of Risk Category of Loans by Class of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 2,399,982	$ 2,196,934
Real Estate \| Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total loans	120,115	96,020
Real Estate \| Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans	854,580	793,268
Real Estate \| Single-family Residential Mortgages
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,070,649	957,254
Commercial \| Other
Accounts Notes And Loans Receivable [Line Items]
Total loans	275,602	274,586
Commercial \| SBA
Accounts Notes And Loans Receivable [Line Items]
Total loans	77,566	74,985
Other
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,470	821
Pass
Accounts Notes And Loans Receivable [Line Items]
Total loans	2,313,654	2,146,181
Pass \| Real Estate \| Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total loans	119,681	95,756
Pass \| Real Estate \| Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans	804,312	767,603
Pass \| Real Estate \| Single-family Residential Mortgages
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,066,360	955,327
Pass \| Commercial \| Other
Accounts Notes And Loans Receivable [Line Items]
Total loans	261,934	265,178
Pass \| Commercial \| SBA
Accounts Notes And Loans Receivable [Line Items]
Total loans	59,897	61,496
Pass \| Other
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,470	821
Special Mention
Accounts Notes And Loans Receivable [Line Items]
Total loans	35,837	9,620
Special Mention \| Real Estate \| Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans	29,073	5,353
Special Mention \| Real Estate \| Single-family Residential Mortgages
Accounts Notes And Loans Receivable [Line Items]
Total loans	495
Special Mention \| Commercial \| Other
Accounts Notes And Loans Receivable [Line Items]
Total loans	6,080	4,078
Special Mention \| Commercial \| SBA
Accounts Notes And Loans Receivable [Line Items]
Total loans	189	189
Substandard
Accounts Notes And Loans Receivable [Line Items]
Total loans	30,217	27,915
Substandard \| Real Estate \| Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total loans	173
Substandard \| Real Estate \| Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans	19,009	18,115
Substandard \| Real Estate \| Single-family Residential Mortgages
Accounts Notes And Loans Receivable [Line Items]
Total loans	865	593
Substandard \| Commercial \| Other
Accounts Notes And Loans Receivable [Line Items]
Total loans	5,719	5,330
Substandard \| Commercial \| SBA
Accounts Notes And Loans Receivable [Line Items]
Total loans	4,451	3,877
Impaired
Accounts Notes And Loans Receivable [Line Items]
Total loans	20,274	13,218
Impaired \| Real Estate \| Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total loans	261	264
Impaired \| Real Estate \| Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total loans	2,186	2,197
Impaired \| Real Estate \| Single-family Residential Mortgages
Accounts Notes And Loans Receivable [Line Items]
Total loans	2,929	1,334
Impaired \| Commercial \| Other
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,869
Impaired \| Commercial \| SBA
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 13,029	$ 9,423

Loans and Allowance for Loan Losses - Summary of Aging Recorded Investment Past-due Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	$ 40,198	$ 15,830
Loans Not Past Due	2,359,784	2,181,104
Total Loans	2,399,982	2,196,934
Non-Accrual Loans	18,005	11,437
Real Estate \| Construction and Land Development
Financing Receivable Recorded Investment Past Due [Line Items]
Loans Not Past Due	120,115	96,020
Total Loans	120,115	96,020
Real Estate \| Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	12,331	725
Loans Not Past Due	842,249	792,543
Total Loans	854,580	793,268
Non-Accrual Loans	725	725
Real Estate \| Single-family Residential Mortgages
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	7,530	3,464
Loans Not Past Due	1,063,119	953,790
Total Loans	1,070,649	957,254
Non-Accrual Loans	2,930	1,334
Real Estate \| Single Family Residential Mortgages Held For Sale
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	404
Loans Not Past Due	51,692	108,194
Total Loans	52,096	108,194
Commercial \| Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	3,959
Loans Not Past Due	271,643	274,586
Total Loans	275,602	274,586
Non-Accrual Loans	1,363
Commercial \| SBA
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	16,304	11,641
Loans Not Past Due	61,262	63,344
Total Loans	77,566	74,985
Non-Accrual Loans	12,987	9,378
Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	74
Loans Not Past Due	1,396	821
Total Loans	1,470	821
30-59 Days
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	18,953	3,717
30-59 Days \| Real Estate \| Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	11,606
30-59 Days \| Real Estate \| Single-family Residential Mortgages
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	3,048	1,454
30-59 Days \| Real Estate \| Single Family Residential Mortgages Held For Sale
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	404
30-59 Days \| Commercial \| Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,554
30-59 Days \| Commercial \| SBA
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	2,671	2,263
30-59 Days \| Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	74
60-89 Days
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	4,405	1,560
60-89 Days \| Real Estate \| Single-family Residential Mortgages
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	2,669	1,560
60-89 Days \| Commercial \| Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,090
60-89 Days \| Commercial \| SBA
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	646
90 Days Or More
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	16,840	10,553
90 Days Or More \| Real Estate \| Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	725	725
90 Days Or More \| Real Estate \| Single-family Residential Mortgages
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,813	450
90 Days Or More \| Commercial \| Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	1,315
90 Days Or More \| Commercial \| SBA
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	$ 12,987	$ 9,378

Loans and Allowance for Loan Losses - Additional Information (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) Loan	Mar. 31, 2019 USD ($) Loan	Dec. 31, 2019 USD ($) Loan	Dec. 31, 2018 USD ($)
Financing Receivable Recorded Investment [Line Items]
Financing receivable, 90 days or more past due, still accruing, number of loans \| Loan	1
Financing receivable, 90 days or more past due, still accruing	$ 225,000
Interest income recognized on cash basis	$ 0		$ 0	$ 0
Number of loans identified as troubled debt restructurings \| Loan	5		4
Troubled debt restructuring, aggregate balance	$ 2,300,000		$ 1,800,000
Reserve for loans	20,130,000	$ 18,236,000	18,816,000
Commitments to lend an additional amounts of outstanding loans are classified as TDR's	$ 0		$ 0
Number of loans modified as troubled debt restructuring past twelve months with payment default \| Loan	0		0
Financing receivable modified as TDR's \| Loan	1	0
Minimum
Financing Receivable Recorded Investment [Line Items]
Moratorium on loan payments period granted	6 months
Maximum
Financing Receivable Recorded Investment [Line Items]
Moratorium on loan payments period granted	9 months
Specific Reserves
Financing Receivable Recorded Investment [Line Items]
Reserve for loans		$ 11,000
One Loan \| Specific Reserves
Financing Receivable Recorded Investment [Line Items]
Reserve for loans	$ 0		$ 0

Loans and Allowance for Loan Losses - Summary of Individually Impaired Loans Presented by Class of Loans (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Financing Receivable Impaired [Line Items]
Principal Balance	$ 20,332		$ 13,234
Recorded Investment	20,274		13,218
Average Balance	22,787	$ 2,597	14,797
Interest Income	37	24	128
Construction and Land Development
Financing Receivable Impaired [Line Items]
Principal Balance, With no related allowance recorded	261		264
Recorded Investment, With no related allowance recorded	261		264
Average Balance, With no related allowance recorded	262	275	271
Interest Income, With no related allowance recorded	2	6	24
Commercial and Industrial
Financing Receivable Impaired [Line Items]
Principal Balance, With no related allowance recorded	1,881
Recorded Investment, With no related allowance recorded	1,869
Average Balance, With no related allowance recorded	1,987
Interest Income, With no related allowance recorded	9
Commercial Real Estate
Financing Receivable Impaired [Line Items]
Principal Balance, With no related allowance recorded	2,186		2,198
Recorded Investment, With no related allowance recorded	2,186		2,197
Average Balance, With no related allowance recorded	2,423	2,100	2,384
Interest Income, With no related allowance recorded	25	17	100
Residential mortgage loans
Financing Receivable Impaired [Line Items]
Principal Balance, With no related allowance recorded	2,965		1,349
Recorded Investment, With no related allowance recorded	2,929		1,334
Average Balance, With no related allowance recorded	2,962		1,351
Commercial \| SBA
Financing Receivable Impaired [Line Items]
Principal Balance, With no related allowance recorded	13,039		9,423
Recorded Investment, With no related allowance recorded	13,029		9,423
Average Balance, With no related allowance recorded	15,153	56	10,791
Interest Income, With no related allowance recorded	$ 1	$ 1	$ 4

Loans and Allowance for Loan Losses - Summary of Impaired Loans and Leases, Disaggregated by Loan Segment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Financing Receivable Impaired [Line Items]
Average Balance	$ 22,787	$ 2,597	$ 14,797
Interest Income	37	24	128
Construction and Land Development
Financing Receivable Impaired [Line Items]
Average Balance, With no related allowance recorded	262	275	271
Interest Income, With no related allowance recorded	2	6	24
Commercial and Industrial
Financing Receivable Impaired [Line Items]
Average Balance, With no related allowance recorded	1,987
Interest Income, With no related allowance recorded	9
Commercial Real Estate
Financing Receivable Impaired [Line Items]
Average Balance, With no related allowance recorded	2,423	2,100	2,384
Interest Income, With no related allowance recorded	25	17	100
Residential mortgage loans
Financing Receivable Impaired [Line Items]
Average Balance, With no related allowance recorded	2,962		1,351
Commercial \| SBA
Financing Receivable Impaired [Line Items]
Average Balance, With no related allowance recorded	15,153	56	10,791
Interest Income, With no related allowance recorded	$ 1	$ 1	$ 4

Loans and Allowance for Loan Losses - Summary of Loans by Class Modified as TDRs (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) Loan	Mar. 31, 2019 Loan
Financing Receivable Recorded Investment [Line Items]
Number of Loans \| Loan	1	0
Pre-Modification Recorded Investment	$ 506
Post-Modification Recorded Investment	$ 506
Commercial and Industrial
Financing Receivable Recorded Investment [Line Items]
Number of Loans \| Loan	1
Pre-Modification Recorded Investment	$ 506
Post-Modification Recorded Investment	$ 506

Loan Servicing - Schedule of Principal Balances of Mortgage and SBA Loans Serviced for Others (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Mortgage Loans
Schedule Of Mortgage And Small Business Administration Loans Serviced [Line Items]
Loans serviced for others	$ 1,673,304	$ 1,683,298
SBA Loans
Schedule Of Mortgage And Small Business Administration Loans Serviced [Line Items]
Loans serviced for others	156,750	170,849
Commercial Real Estate Loans
Schedule Of Mortgage And Small Business Administration Loans Serviced [Line Items]
Loans serviced for others	$ 4,199	$ 4,216

Loan Servicing - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Loan Sales And Mortgage Servicing Rights [Line Items]
Servicing assets	$ 16,826		$ 17,083
Servicing fees net of servicing asset amortization	592	$ 840
Mortgage Loans
Loan Sales And Mortgage Servicing Rights [Line Items]
Servicing assets	13,200		15,100
SBA Loans
Loan Sales And Mortgage Servicing Rights [Line Items]
Servicing assets	$ 4,100		$ 5,600

Loan Servicing - Schedule of Amortization of Mortgage Servicing Rights Netted Against Loan Servicing Fee Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Mortgage Loans
Servicing assets:
Beginning of period	$ 12,997	$ 12,858
Additions	789	604
Disposals	(343)	(33)
Amortized to expense	(382)	(466)
End of period	13,061	12,963
SBA Loans
Servicing assets:
Beginning of period	4,086	4,512
Additions	38	112
Disposals	(217)	(127)
Amortized to expense	(142)	(172)
End of period	$ 3,765	$ 4,325

Goodwill and Intangibles - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Schedule Of Finite Lived Intangible Assets And Goodwill [Line Items]
Goodwill	$ 69,790,000		$ 58,563,000
Impairment losses recognized on goodwill	0	$ 0
Unamortized balance of intangible assets	6,234,000		$ 6,100,000
Amortization of intangibles	1,441,000	1,187,000
Core Deposit Intangible
Schedule Of Finite Lived Intangible Assets And Goodwill [Line Items]
Amortization of intangibles	$ 357,000	$ 388,000
Core Deposit Intangible \| Minimum
Schedule Of Finite Lived Intangible Assets And Goodwill [Line Items]
Intangible assets, estimated useful life	8 years
Core Deposit Intangible \| Maximum
Schedule Of Finite Lived Intangible Assets And Goodwill [Line Items]
Intangible assets, estimated useful life	10 years

Goodwill and Intangibles - Schedule of Future Estimated Amortization Expense (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Remainder of 2020	$ 1,037
2021	1,121
2022	936
2023	800
2024	683
Thereafter	1,657
Total	$ 6,234

Deposits - Schedule of Maturities of Time Deposits (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Maturities Of Time Deposits [Abstract]
One year	$ 1,267,249
Two to three years	76,236
Over three years	16,301
Total	$ 1,359,786

Deposits - Additional Information (Details)	Mar. 26, 2020
Maturities Of Time Deposits [Abstract]
Reduction of reserve requirement ratio	0.00%

Long-term Debt - Additional Information (Details) - USD ($)	1 Months Ended		3 Months Ended
	Nov. 30, 2018	Mar. 31, 2016	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt instrument, face amount			$ 105,000,000	$ 105,000,000
6.5% Fixed to Floating Rate Subordinated Debentures, Due March 31, 2026
Debt Instrument [Line Items]
Debt instrument, face amount		$ 50,000,000
Long-term debt, fixed interest rate		6.50%
Debt instrument, due date		Mar. 31, 2026
Debt instrument, fixed to floating interest rate conversion date		Mar. 31, 2021
Debt instrument, floating rate description			3 month LIBOR plus 516 basis points
Debt instrument, basis points		5.16%
Tier-1 capital			$ 35,000,000
Debt instrument, redemption period, start date			Mar. 31, 2021
6.18% Fixed to Floating Rate Subordinated Debentures, Due December 1, 2028
Debt Instrument [Line Items]
Debt instrument, face amount	$ 55,000,000
Long-term debt, fixed interest rate	6.18%
Debt instrument, due date	Dec. 01, 2028
Debt instrument, fixed to floating interest rate conversion date	Dec. 01, 2023
Debt instrument, floating rate description			3 month LIBOR plus 315 basis points
Debt instrument, basis points	3.15%
Tier-1 capital			$ 25,000,000
Debt instrument, redemption period, start date			Dec. 01, 2023

Long-term Debt - Schedule of Long-term Debt (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Debt Instruments [Abstract]
Principal	$ 105,000,000	$ 105,000,000
Unamortized debt issuance costs	$ 865,000	$ 951,000

Long-term Debt - Schedule of Interest and Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest Expense:
Interest	$ 1,662	$ 1,662
Amortization	$ 86	$ 85

Subordinated Debentures - Additional Information (Details)			1 Months Ended	3 Months Ended
	Feb. 19, 2016 USD ($) $ / shares shares	Mar. 15, 2012	Oct. 31, 2018 USD ($) Security shares	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Principal				$ 105,000,000		$ 105,000,000
Interest expense, paid				1,662,000	$ 1,662,000
Debt aggregate amortization expense				55,000	42,000
Subordinated Debentures
Debt Instrument [Line Items]
Interest expense, paid				153,000	$ 144,000
TFC Statutory Trust \| Private Offering
Debt Instrument [Line Items]
Number of trust preferred securities \| shares	5,000
Trust preferred securities liquidation amount per preferred security \| $ / shares	$ 1,000
TFC Statutory Trust \| Subordinated Debentures
Debt Instrument [Line Items]
Principal	$ 5,000,000
Debt valuation reserve				$ 1,900,000
Redemption percentage of principal amount outstanding		100.00%
Debt instrument redemption period				Mar. 15, 2012
Debt instrument maturity period				Mar. 15, 2037
Defer interest payments maximum period				5 years
Debt instrument interest rate description				the three month LIBOR plus 1.65%, which was 2.39% as of March 31, 2020 and 3.54% at December 31, 2019.
Debt instrument interest percentage				2.39%		3.54%
TFC Statutory Trust \| Fair Value, Inputs, Level 1
Debt Instrument [Line Items]
Subordinated debenture liability	$ 3,300,000
First American International Statutory Trust I
Debt Instrument [Line Items]
Number of units issued \| shares			7,000
Aggregate liquidation amount of units issued			$ 7,000,000
Floating rate maturity period			30 years
First American International Statutory Trust I \| Subordinated Debentures
Debt Instrument [Line Items]
Principal			$ 7,000,000
Debt valuation reserve				$ 1,200,000
Debt instrument maturity period				Dec. 15, 2034
Defer interest payments maximum period				5 years
Debt instrument interest rate description				the three-month LIBOR plus 2.25% through final maturity on December 15, 2034. The rate at March 31, 2020 was 2.99% and 4.14% at December 31, 2019.
Debt instrument interest percentage				2.99%		4.14%
PGBH
Debt Instrument [Line Items]
Number of units issued \| shares			5,000
Aggregate liquidation amount of units issued			$ 5,000,000
Number of securities issued \| Security			155
Aggregate liquidation amount of securities issued			$ 155,000
PGBH \| Subordinated Debentures
Debt Instrument [Line Items]
Principal			$ 5,200,000
Debt valuation reserve				$ 763,000
Debt instrument maturity period				Dec. 15, 2034
Defer interest payments maximum period				5 years
Debt instrument interest rate description				the three-month LIBOR plus 2.10% through final maturity on December 15, 2034. The rate at March 31, 2020 was 2.84%.
Debt instrument interest percentage				2.84%
Other Assets \| TFC Statutory Trust
Debt Instrument [Line Items]
Investment in common stock				$ 155,000
Other Assets \| First American International Statutory Trust I
Debt Instrument [Line Items]
Investment in common stock				$ 217,000
London Interbank Offered Rate \| TFC Statutory Trust \| Subordinated Debentures
Debt Instrument [Line Items]
Debt instrument, basis points				1.65%
London Interbank Offered Rate \| First American International Statutory Trust I \| Subordinated Debentures
Debt Instrument [Line Items]
Debt instrument, basis points				2.25%
London Interbank Offered Rate \| PGBH \| Subordinated Debentures
Debt Instrument [Line Items]
Debt instrument, basis points				2.10%

Borrowing Arrangements - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Line of credit amount outstanding	$ 0	$ 0
FHLB advances	150,000,000	$ 0
FRB Secured Line of Credit
Debt Instrument [Line Items]
Borrowing capacity	14,000,000
Carrying value of collateral loan pledged	28,600,000
FHLB Secured Line of Credit
Debt Instrument [Line Items]
Borrowing capacity	468,200,000
Carrying value of collateral loan pledged	568,700,000
Zions Bank
Debt Instrument [Line Items]
Borrowing capacity	20,000,000
Wells Fargo Bank
Debt Instrument [Line Items]
Borrowing capacity	10,000,000
First Tennessee National Bank
Debt Instrument [Line Items]
Borrowing capacity	12,000,000
Pacific Coast Bankers' Bank
Debt Instrument [Line Items]
Borrowing capacity	5,000,000
FHLB
Debt Instrument [Line Items]
Line of credit amount outstanding	$ 150,000,000
Debt instrument, term	5 years
Overnight advances interest percentage	1.18%
Maturity date	2025-03
Letter of Credit \| Wells Fargo Bank
Debt Instrument [Line Items]
Borrowing capacity	$ 2,000,000

Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income tax expense	$ 3,252,000	$ 3,859,000
Effective tax rate	32.50%	27.10%
Tax benefit from stock option exercises	$ 28,000	$ 133,000

Commitments - Schedule of Future Minimum Rent Payments on Company's Leases (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Commitments And Contingencies Disclosure [Abstract]
2020 remaining	$ 4,241
2021	4,751
2022	4,284
2023	3,322
2024	2,224
Thereafter	9,016
Total	$ 27,838

Commitments - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Commitments And Contingencies Disclosure [Abstract]
Total rental expense, recognized on straight-line basis	$ 1,500,000	$ 1,500,000
Rental income received	$ 84,000	$ 49,000

Commitments - Schedule of Financial Commitments whose Contractual Amount Represents Credit Risk (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Loss Contingencies [Line Items]
Financial commitments, contractual amount	$ 391,438	$ 330,199
Commitments to Extend Credit
Loss Contingencies [Line Items]
Financial commitments, contractual amount	387,248	326,126
Commercial and Similar Letters of Credit
Loss Contingencies [Line Items]
Financial commitments, contractual amount	227	358
Standby Letters of Credit
Loss Contingencies [Line Items]
Financial commitments, contractual amount	$ 3,963	$ 3,715

Related Party Transactions - Schedule of Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Related Party Transactions [Abstract]
Beginning balance	$ 4,000	$ 3,600
New loans and advances	4,000	16,180
Repayments	(4,000)	(15,780)
Ending balance	$ 4,000	$ 4,000

Related Party Transactions - Additional Information (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Executive Officers, Directors and their Related Interests
Related Party Transaction [Line Items]
Unfunded loan commitments outstanding to related parties	$ 0	$ 0
Principal Officers, Directors and their Affiliates
Related Party Transaction [Line Items]
Deposits from related parties	$ 81,400,000	$ 84,600,000

Stock-based Compensation - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Jan. 18, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 161,000	$ 231,000
Income tax benefits recognized	28,000	92,000
Total unrecognized compensation cost	$ 512,000
Unrecognized compensation costs, weighted-average recognition period	2 years 2 months 12 days
Total fair value of shares vested	$ 350,000		$ 460,000
Number of nonvested stock options	99,000		76,500
Weighted average grant date fair value, nonvested stock options	$ 5.43		$ 6.32
Stock options exercised, shares	56,498		200,629
Stock options exercised	$ 712,000	$ 904,000	$ 2,800,000
Intrinsic value of options exercised	$ 389,000		$ 1,200,000
2010 Stock Option Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for issuance				3,494,478
Additional shares of common stock available for grant	0
2010 Stock Option Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved as percentage of issued and outstanding shares	30.00%
Omnibus Stock Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for issuance	3,848,341
Percentage of number of shares of common stock issued and outstanding	6.11%
Available for issuance of common stock	1,207,045
Omnibus Stock Incentive Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved as percentage of issued and outstanding shares				30.00%

Stock-based Compensation - Schedule of Weighted Average Assumption for Fair Value of Option Grant Estimated Using Black-Scholes Option Pricing Model (Details) - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Expected volatility	28.50%	35.00%
Expected term	6 years	6 years
Expected dividends	1.99%	1.90%
Risk free rate	1.31%	2.66%
Grant date fair value	$ 4.61	$ 6.32

Share-based Compensation - Summary of Awards Pursuant to Stock Option Plans (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Beginning Balance, Shares	1,090,968
Granted, Shares	51,000
Exercised, Shares	(56,498)	(200,629)
Forfeited/cancelled, Shares	(4,000)
Ending Balance, Shares	1,081,470	1,090,968
Options exercisable, Shares	982,470
Beginning Balance, Weighted Average Exercise Price	$ 13.11
Granted, Weighted Average Exercise Price	20.10
Exercised, Weighted Average Exercise Price	12.61
Forfeited/cancelled, Weighted Average Exercise Price	18.38
Ending Balance, Weighted Average Exercise Price	13.45	$ 13.11
Options exercisable, Weighted Average Exercise Price	$ 12.87
Ending Balance, Weighted Average Remaining Contractual Term	4 years 1 month 6 days
Options exercisable, Weighted Average Remaining Contractual Term	3 years 6 months 25 days
Ending Balance, Aggregate Intrinsic Value	$ 1,826
Options exercisable, Aggregate Intrinsic Value	$ 1,826

Regulatory Matters - Additional Information (Details) - USD ($)	Jan. 01, 2019	Jan. 01, 2018	Jan. 02, 2017	Jan. 02, 2016	Jan. 01, 2015	Mar. 31, 2020
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Common equity Tier 1 capital to risk-weighted assets ratio with minimum for capital adequacy					4.50%
Common equity Tier 1 capital to risk-weighted assets ratio with minimum for prompt corrective action purposes					6.50%
Tier 1 capital to risk-weighted assets ratio with minimum for capital adequacy					4.00%
Increased Tier 1 capital to risk-weighted assets ratio with minimum for capital adequacy					6.00%
Tier 1 capital to risk-weighted assets ratio with minimum for prompt corrective action purposes					6.00%
Increased Tier 1 capital to risk-weighted assets ratio with minimum for prompt corrective action purposes					8.00%
Capital conservation buffer	2.50%	2.50%	2.50%	0.625%	2.50%
Capital conservation buffer phased-in on pro rata basis period				4 years
Minimum
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Regulatory assets	$ 3,000,000,000
Required assets to liabilities ratio after dividend effect						125.00%

Regulatory Matters - Summary of Company and Bank Continue to Exceed Regulatory Capital Minimum Requirements and Bank Continues to Exceed Well Capitalized Standards (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Jan. 01, 2015
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 Risk-Based Capital Ratio, Minimum Required for Capital Adequacy Purposes Ratio			4.00%
Tier 1 Risk-Based Capital Ratio, To Be Well-Capitalized Under Prompt Corrective Provisions Ratio			6.00%
RBB Bancorp
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 Leverage Ratio, Amount	$ 347,133	$ 353,572
Tier 1 Leverage Ratio, Ratio	11.74%	12.89%
Common Equity Tier 1 Risk-Based Capital Ratio, Amount	$ 333,013	$ 343,899
Common Equity Tier 1 Risk-Based Capital Ratio, Ratio	15.45%	17.16%
Tier 1 Risk-Based Capital Ratio, Amount	$ 347,133	$ 353,572
Tier 1 Risk-Based Capital Ratio, Ratio	16.10%	17.65%
Total Risk-Based Capital Ratio, Amount	$ 472,376	$ 477,262
Total Risk-Based Capital Ratio, Ratio	21.91%	23.82%
Royal Business Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 Leverage Ratio, Amount	$ 426,236	$ 417,036
Tier 1 Leverage Ratio, Ratio	14.44%	15.23%
Tier 1 Leverage Ratio, Minimum Required for Capital Adequacy Purposes Amount	$ 118,042	$ 108,150
Tier 1 Leverage Ratio, Minimum Required for Capital Adequacy Purposes Ratio	4.00%	4.00%
Tier 1 Leverage Ratio, Minimum Required Plus Capital Conservation Buffer Fully Phased-In Amount	$ 118,042	$ 108,150
Tier 1 Leverage Ratio, Minimum Required Plus Capital Conservation Buffer Fully Phased-In Ratio	4.00%	4.00%
Tier 1 Leverage Ratio, To Be Well-Capitalized Under Prompt Corrective Provisions Amount	$ 147,552	$ 135,187
Tier 1 Leverage Ratio, To Be Well-Capitalized Under Prompt Corrective Provisions Ratio	5.00%	5.00%
Common Equity Tier 1 Risk-Based Capital Ratio, Amount	$ 426,236	$ 417,036
Common Equity Tier 1 Risk-Based Capital Ratio, Ratio	19.79%	20.87%
Common Equity Tier 1 Risk-Based Capital Ratio, Minimum Required for Capital Adequacy Purposes Amount	$ 96,911	$ 89,127
Common Equity Tier 1 Risk-Based Capital Ratio, Minimum Required for Capital Adequacy Purposes Ratio	4.50%	4.50%
Common Equity Tier 1 Risk-Based Capital Ratio, Minimum Required Plus Capital Conversation Buffer Fully Phased-In, Amount	$ 150,750	$ 138,642
Common Equity Tier 1 Risk-Based Capital Ratio, Minimum Required Plus Capital Conversation Buffer Fully Phased-In, Ratio	7.00%	7.00%
Common Equity Tier 1 Risk-Based Capital Ratio, To Be Well-Capitalized Under Prompt Corrective Provisions Amount	$ 139,982	$ 128,739
Common Equity Tier 1 Risk-Based Capital Ratio, To Be Well-Capitalized Under Prompt Corrective Provisions Ratio	6.50%	6.50%
Tier 1 Risk-Based Capital Ratio, Amount	$ 426,236	$ 417,036
Tier 1 Risk-Based Capital Ratio, Ratio	19.79%	20.87%
Tier 1 Risk-Based Capital Ratio, Minimum Required for Capital Adequacy Purposes Amount	$ 129,214	$ 118,836
Tier 1 Risk-Based Capital Ratio, Minimum Required for Capital Adequacy Purposes Ratio	6.00%	6.00%
Tier 1 Risk-Based Capital Ratio, Minimum Required Plus Capital Conversation Buffer Fully Phased-In, Amount	$ 183,054	$ 168,351
Tier 1 Risk-Based Capital Ratio, Minimum Required Plus Capital Conversation Buffer Fully Phased-In, Ratio	8.50%	8.50%
Tier 1 Risk-Based Capital Ratio, To Be Well-Capitalized Under Prompt Corrective Provisions Amount	$ 172,286	$ 158,448
Tier 1 Risk-Based Capital Ratio, To Be Well-Capitalized Under Prompt Corrective Provisions Ratio	8.00%	8.00%
Total Risk-Based Capital Ratio, Amount	$ 447,344	$ 436,677
Total Risk-Based Capital Ratio, Ratio	20.77%	21.86%
Total Risk-Based Capital Ratio, Minimum Required for Capital Adequacy Purposes Amount	$ 172,286	$ 158,448
Total Risk-Based Capital Ratio, Minimum Required for Capital Adequacy Purposes Ratio	8.00%	8.00%
Total Risk-Based Capital Ratio, Minimum Required Plus Capital Conversation Buffer Fully Phased-In, Amount	$ 226,125	$ 207,964
Total Risk-Based Capital Ratio, Minimum Required Plus Capital Conversation Buffer Fully Phased-In, Ratio	10.50%	10.50%
Total Risk-Based Capital Ratio, To Be Well-Capitalized Under Prompt Corrective Provisions Amount	$ 215,357	$ 198,061
Total Risk-Based Capital Ratio, To Be Well-Capitalized Under Prompt Corrective Provisions Ratio	10.00%	10.00%

Fair Value Measurements - Schedule of Hierarchy and Fair Value for Each Major Category of Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value Measurements, Recurring Basis
Assets measured at fair value:
Assets measured at fair value	$ 126,294	$ 126,069
Fair Value Measurements, Recurring Basis \| Government Agency Securities
Assets measured at fair value:
Assets measured at fair value	1,426	1,572
Fair Value Measurements, Recurring Basis \| SBA Agency Securities
Assets measured at fair value:
Assets measured at fair value	4,647	4,691
Fair Value Measurements, Recurring Basis \| Mortgage-Backed Securities
Assets measured at fair value:
Assets measured at fair value	18,772	19,171
Fair Value Measurements, Recurring Basis \| Collateralized Mortgage Obligations
Assets measured at fair value:
Assets measured at fair value	11,219	11,654
Fair Value Measurements, Recurring Basis \| Corporate Debt Securities
Assets measured at fair value:
Assets measured at fair value	90,230	19,083
Fair Value Measurements, Recurring Basis \| Commercial Paper
Assets measured at fair value:
Assets measured at fair value		69,898
Fair Value Measurements, Nonrecurring Basis
Assets measured at fair value:
Assets measured at fair value	3,901
Fair Value Measurements, Nonrecurring Basis \| Commercial Real Estate \| Collateral Dependent Impaired Loans
Assets measured at fair value:
Assets measured at fair value	3,608
Fair Value Measurements, Nonrecurring Basis \| Other Real Estate Owned
Assets measured at fair value:
Assets measured at fair value	293	293
Fair Value Measurements Using Level 2 \| Fair Value Measurements, Recurring Basis
Assets measured at fair value:
Assets measured at fair value	126,294	126,069
Fair Value Measurements Using Level 2 \| Fair Value Measurements, Recurring Basis \| Government Agency Securities
Assets measured at fair value:
Assets measured at fair value	1,426	1,572
Fair Value Measurements Using Level 2 \| Fair Value Measurements, Recurring Basis \| SBA Agency Securities
Assets measured at fair value:
Assets measured at fair value	4,647	4,691
Fair Value Measurements Using Level 2 \| Fair Value Measurements, Recurring Basis \| Mortgage-Backed Securities
Assets measured at fair value:
Assets measured at fair value	18,772	19,171
Fair Value Measurements Using Level 2 \| Fair Value Measurements, Recurring Basis \| Collateralized Mortgage Obligations
Assets measured at fair value:
Assets measured at fair value	11,219	11,654
Fair Value Measurements Using Level 2 \| Fair Value Measurements, Recurring Basis \| Corporate Debt Securities
Assets measured at fair value:
Assets measured at fair value	90,230	19,083
Fair Value Measurements Using Level 2 \| Fair Value Measurements, Recurring Basis \| Commercial Paper
Assets measured at fair value:
Assets measured at fair value		69,898
Fair Value Measurements Using Level 3 \| Fair Value Measurements, Nonrecurring Basis
Assets measured at fair value:
Assets measured at fair value	3,901
Fair Value Measurements Using Level 3 \| Fair Value Measurements, Nonrecurring Basis \| Commercial Real Estate \| Collateral Dependent Impaired Loans
Assets measured at fair value:
Assets measured at fair value	3,608
Fair Value Measurements Using Level 3 \| Fair Value Measurements, Nonrecurring Basis \| Other Real Estate Owned
Assets measured at fair value:
Assets measured at fair value	$ 293	$ 293

Fair Value Measurements - Additional Information (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($) Property	Dec. 31, 2019 USD ($)
Fair Value Option Quantitative Disclosures [Line Items]
Write-downs to OREO	$ 0	$ 0
Other Real Estate Owned \| Single-Family Residences
Fair Value Option Quantitative Disclosures [Line Items]
Number of other real estate owned \| Property	1
Assets measured at fair value	$ 293,000

Fair Value Measurements - Summary of Quantitative Information About Impaired Loans and OREO Non-recurring Level 3 Fair Value Measurements (Details) - Fair Value Measurements, Nonrecurring Basis $ in Thousands	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 3,901
Collateral Dependent Impaired Loans \| Commercial Real Estate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 3,608
Collateral Dependent Impaired Loans \| Third Party Appraisals \| Measurement Input, Comparability Adjustment \| Commercial Real Estate \| Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Adjustment	6
Fair Value Measurements Using Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 3,901
Fair Value Measurements Using Level 3 \| Collateral Dependent Impaired Loans \| Commercial Real Estate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	3,608
Fair Value Measurements Using Level 3 \| Collateral Dependent Impaired Loans \| Third Party Appraisals \| Commercial Real Estate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 3,608
Fair Value Measurements Using Level 3 \| Collateral Dependent Impaired Loans \| Third Party Appraisals \| Measurement Input, Comparability Adjustment \| Commercial Real Estate \| Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Adjustment	5
Other Real Estate Owned
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 293	$ 293
Other Real Estate Owned \| Third Party Appraisals \| Measurement Input, Comparability Adjustment \| Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Adjustment	6	6
Other Real Estate Owned \| Fair Value Measurements Using Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 293	$ 293
Other Real Estate Owned \| Fair Value Measurements Using Level 3 \| Third Party Appraisals
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value	$ 293	$ 293
Other Real Estate Owned \| Fair Value Measurements Using Level 3 \| Third Party Appraisals \| Measurement Input, Comparability Adjustment \| Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Adjustment	5	5

Fair Value of Financial Instruments - Schedule of Fair Value Hierarchy Level and Estimated Fair Value of Significant Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financial Assets:
Investment securities - AFS	$ 126,294	$ 126,069
Investment securities - HTM	8,154	8,632
Carrying Value
Financial Assets:
Cash and due from banks	285,667	114,763
Federal funds sold and other cash equivalents	75,300	67,000
Interest-earning deposits in other financial institutions	600	600
Investment securities - AFS	126,294	126,069
Investment securities - HTM	7,825	8,332
Mortgage loans held for sale	52,096	108,194
Loans, net	2,379,852	2,178,118
Equity security	11,817	11,826
Mortgage serving rights	16,826	17,083
Financial Liabilities:
Deposits	2,435,981	2,248,938
FHLB advances	150,000
Long-term debt	104,135	104,049
Subordinated debenture liability	14,120	9,673
Fair Value \| Fair Value, Inputs, Level 1
Financial Assets:
Cash and due from banks	285,667	114,763
Federal funds sold and other cash equivalents	75,300	67,000
Interest-earning deposits in other financial institutions	600	600
Mortgage loans held for sale	52,664	109,385
Fair Value \| Fair Value Measurements Using Level 2
Financial Assets:
Investment securities - AFS	126,294	126,069
Investment securities - HTM	8,154	8,632
Mortgage serving rights	17,251	20,752
Financial Liabilities:
Deposits	2,427,037	2,236,329
FHLB advances	150,000
Long-term debt	131,284	109,877
Fair Value \| Fair Value Measurements Using Level 3
Financial Assets:
Loans, net	2,325,638	2,158,970
Equity security	11,817	11,826
Financial Liabilities:
Subordinated debenture liability	$ 20,902	$ 11,709

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net income as reported	$ 6,748	$ 10,380
Less: Earnings allocated to participating securities	$ (10)	$ (22)
Shares outstanding	19,739,280	20,073,991
Impact of weighting shares	232,576	(69,700)
Used in basic EPS, Income	$ 6,738	$ 10,358
Used in basic EPS, Shares	19,971,856	20,004,291
Dilutive effect of outstanding
Stock options, Shares	294,472	389,025
Used in dilutive EPS, Income	$ 6,738	$ 10,358
Used in dilutive EPS, Shares	20,266,328	20,393,316
Basic earnings per common share	$ 0.34	$ 0.52
Diluted earnings per common share	$ 0.33	$ 0.51

Earnings Per Share - Additional Information (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Stock options \| Common Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Excluded common stock for computation of diluted earnings per share	263,500	76,500

Revenue From Contracts With Customers - Additional Information (Details)	Jan. 01, 2019 USD ($)
ASU 2014-09
Disaggregation Of Revenue [Line Items]
Cumulative effect adjustment to retained earnings	$ 0

Revenue From Contracts With Customers - Summary of Revenue From Contracts With Customers in-Scope and Not in-Scope under Topic 606 (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation Of Revenue [Line Items]
Total in-scope non-interest income	$ 1,052	$ 787
Non-interest income, not in scope	3,563	3,415
Total noninterest income	4,615	4,202
Fees and Service Charges on Deposit Accounts
Disaggregation Of Revenue [Line Items]
Total in-scope non-interest income	451	298
Other Fees
Disaggregation Of Revenue [Line Items]
Total in-scope non-interest income	149	198
Other Income
Disaggregation Of Revenue [Line Items]
Total in-scope non-interest income	$ 452	$ 291

Qualified Affordable Housing Project Investments - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Schedule Of Equity Method Investments [Line Items]
Investment for qualified affordable housing projects	$ 8,400,000		$ 8,600,000
Unfunded commitments related to the investments in qualified affordable housing projects	2,200,000		$ 4,200,000
Amortization expense	$ 247,000	$ 225,000
Minimum
Schedule Of Equity Method Investments [Line Items]
Expected year in which commitments are fulfilled	2020
Maximum
Schedule Of Equity Method Investments [Line Items]
Expected year in which commitments are fulfilled	2027

Recent Developments - Additional Information (Details) - Subsequent Event	Apr. 20, 2020 $ / shares
Recent Developments [Line Items]
Cash dividend announced date	Apr. 20, 2020
Cash dividends announced per share	$ 0.06
Cash dividend payable date	May 13, 2020
Cash dividend announced, record date	Apr. 30, 2020