Bank of Marin Bancorp (BMRC) 10-Q 7 May 21 2021 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Mar. 31, 2021	Apr. 30, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	001-33572
Entity Registrant Name	Bank of Marin Bancorp
Entity Incorporation, State or Country Code	CA
Entity Tax Identification Number	20-8859754
Entity Address, Address Line One	504 Redwood Blvd.
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	Novato
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94947
City Area Code	415
Local Phone Number	763-4520
Title of 12(b) Security	Common stock, no par value and attached Share Purchase Rights
Trading Symbol	BMRC
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Smaller Reporting Company	false
Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		13,210,129
Entity Central Index Key	0001403475
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false

CONSOLIDATED STATEMENTS OF COND

CONSOLIDATED STATEMENTS OF CONDITION - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets
Cash, cash equivalents and restricted cash	$ 142,819	$ 200,320
Investment securities:
Held-to-maturity, at amortized cost (net of zero allowance for credit losses at March 31, 2021 and December 31, 2020 )	151,970	109,036
Available-for-sale, at fair value (net of zero allowance for credit losses at March 31, 2021 and December 31, 2020 )	518,568	392,351
Total investment securities	670,538	501,387
Loans, at amortized cost	2,121,772	2,088,556
Allowance for credit losses	(19,958)	(22,874)
Loans, net of allowance for credit losses	2,101,814	2,065,682
Bank premises and equipment, net	4,604	4,919
Goodwill	30,140	30,140
Core deposit intangible	3,627	3,831
Operating lease right-of-use assets	24,559	25,612
Interest receivable and other assets	80,032	80,035
Total assets	3,058,133	2,911,926
Deposits
Non-interest bearing	1,445,282	1,354,650
Interest bearing
Transaction accounts	176,390	183,552
Savings accounts	224,748	201,507
Money market accounts	714,824	667,107
Time accounts	94,955	97,433
Total deposits	2,656,199	2,504,249
Borrowings and other obligations	30	58
Subordinated debenture	0	2,777
Operating lease liabilities	25,993	27,062
Interest payable and other liabilities	25,619	19,527
Total liabilities	2,707,841	2,553,673
Stockholders' Equity
Preferred stock, no par value, Authorized - 5,000,000 shares, none issued	0	0
Common stock, no par value, Authorized - 30,000,000 shares; issued and outstanding - 13,326,509 and 13,500,453 at March 31, 2021 and December 31, 2020, respectively	118,386	125,905
Retained earnings	225,600	219,747
Accumulated other comprehensive income, net of taxes	6,306	12,601
Total stockholders' equity	350,292	358,253
Total liabilities and stockholders' equity	$ 3,058,133	$ 2,911,926

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Investment securities:
Held-to-maturity, allowance for credit Loss	$ 0	$ 0
Available-for-sale, allowance for credit Loss	$ 0	$ 0
Stockholders' Equity
Preferred stock, authorized (in shares)	5,000,000	5,000,000
Preferred stock, issued (in shares)	0	0
Common stock, authorized (in shares)	30,000,000	30,000,000
Common stock, issued (in shares)	13,326,509	13,500,453
Common stock, outstanding (in shares)	13,326,509	13,500,453

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest income
Interest and fees on loans	$ 20,661	$ 20,887
Interest on investment securities	3,129	4,165
Interest on federal funds sold and due from banks	42	332
Total interest income	23,832	25,384
Interest expense
Interest on interest-bearing transaction accounts	39	66
Interest on savings accounts	19	16
Interest on money market accounts	286	971
Interest on time accounts	96	161
Interest on borrowings and other obligations	0	2
Interest on subordinated debenture	1,361	49
Total interest expense	1,801	1,265
Net interest income	22,031	24,119
(Reversal of) provision for credit losses on loans	(2,929)
(Reversal of) provision for credit losses on loans		2,200
Net interest income after (reversal of) provision for credit losses	24,960	21,919
Non-interest income
Earnings on bank-owned life insurance, net	257	275
Dividends on Federal Home Loan Bank stock	149	208
Gains on sale of investment securities, net	0	800
Other income	228	449
Total non-interest income	1,826	3,120
Non-interest expense
Salaries and related benefits	9,208	9,477
Occupancy and equipment	1,751	1,663
Professional services	863	544
Data processing	819	786
Depreciation and amortization	459	526
Information technology	313	250
Amortization of core deposit intangible	204	213
Federal Deposit Insurance Corporation insurance	179	2
Directors' expense	175	174
Charitable contributions	31	167
(Reversal of) provision for credit losses on unfunded loan commitments	(590)	102
Other expense	1,410	1,565
Total non-interest expense	14,822	15,469
Income before provision for income taxes	11,964	9,570
Provision for income taxes	3,017	2,342
Net income	$ 8,947	$ 7,228
Net income per common share:
Basic (in dollars per share)	$ 0.67	$ 0.53
Diluted (in dollars per share)	$ 0.66	$ 0.53
Weighted average shares:
Basic (in shares)	13,363	13,525
Diluted (in shares)	13,469	13,656
Comprehensive income (loss):
Net income	$ 8,947	$ 7,228
Other comprehensive (loss) income
Change in net unrealized gains on available-for-sale securities	(9,082)	9,812
Reclassification adjustment for (gains) on available-for-sale securities included in net income	0	(800)
Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity	143	110
Other comprehensive (loss) income, before tax	(8,939)	9,122
Deferred tax (benefit) expense	(2,644)	2,697
Other comprehensive (loss) income, net of tax	(6,295)	6,425
Total comprehensive income	2,652	13,653
Deposit account
Non-interest income
Service charges on deposit accounts, wealth management and trust services, debit card interchange fees net, and merchant interchange fees net	281	451
Fiduciary and trust
Non-interest income
Service charges on deposit accounts, wealth management and trust services, debit card interchange fees net, and merchant interchange fees net	488	504
Debit card
Non-interest income
Service charges on deposit accounts, wealth management and trust services, debit card interchange fees net, and merchant interchange fees net	366	360
Merchant interchange fees, net
Non-interest income
Service charges on deposit accounts, wealth management and trust services, debit card interchange fees net, and merchant interchange fees net	$ 57	$ 73

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income, Net of Taxes
Beginning balance (in shares) at Dec. 31, 2019		13,577,008
Beginning balance at Dec. 31, 2019	$ 336,788	$ 129,058	$ 203,227	$ 4,503
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,228		7,228
Other comprehensive (loss) income	6,425			6,425
Stock options exercised, net of shares surrendered for cashless exercises and tax withholdings (in shares)		49,055
Stock options exercised, net of shares surrendered for cashless exercises and tax withholdings	824	$ 824
Stock issued under employee stock purchase plan (in shares)		547
Stock issued under employee stock purchase plan	16	$ 16
Stock issued under employee stock ownership plan (in shares)		7,900
Stock issued under employee stock ownership plan	324	$ 324
Restricted stock granted (in shares)		29,100
Restricted stock granted	0
Restricted stock surrendered for tax withholdings upon vesting (in shares)		(2,200)
Restricted stock surrendered for tax withholdings upon vesting	(73)	$ (73)
Restricted stock forfeited / cancelled (in shares)		(5,787)
Stock-based compensation - stock options	169	$ 169
Stock-based compensation - restricted stock	461	$ 461
Cash dividends paid on common stock	(3,127)		(3,127)
Stock purchased by directors under director stock plan (in shares)		400
Stock purchased by directors under director stock plan	18	$ 18
Stock issued in payment of director fees (in shares)		2,610
Stock issued in payment of director fees	117	$ 117
Stock repurchased, net of commissions (in shares)		(92,664)
Stock repurchased, net of commissions	(3,230)	$ (3,230)
Ending balance (in shares) at Mar. 31, 2020		13,565,969
Ending balance at Mar. 31, 2020	$ 345,940	$ 127,684	207,328	10,928
Beginning balance (in shares) at Dec. 31, 2020	13,500,453	13,500,453
Beginning balance at Dec. 31, 2020	$ 358,253	$ 125,905	219,747	12,601
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,947		8,947
Other comprehensive (loss) income	(6,295)			(6,295)
Stock options exercised, net of shares surrendered for cashless exercises and tax withholdings (in shares)		17,180
Stock options exercised, net of shares surrendered for cashless exercises and tax withholdings	38	$ 38
Stock issued under employee stock purchase plan (in shares)		778
Stock issued under employee stock purchase plan	28	$ 28
Stock issued under employee stock ownership plan (in shares)		9,000
Stock issued under employee stock ownership plan	332	$ 332
Restricted stock granted (in shares)		27,054
Restricted stock granted	0
Restricted stock surrendered for tax withholdings upon vesting (in shares)		(3,961)
Restricted stock surrendered for tax withholdings upon vesting	(156)	$ (156)
Restricted stock forfeited / cancelled (in shares)		(3,848)
Stock-based compensation - stock options	172	$ 172
Stock-based compensation - restricted stock	443	$ 443
Cash dividends paid on common stock	(3,094)		(3,094)
Stock purchased by directors under director stock plan (in shares)		519
Stock purchased by directors under director stock plan	18	$ 18
Stock issued in payment of director fees (in shares)		3,347
Stock issued in payment of director fees	117	$ 117
Stock repurchased, net of commissions (in shares)		(224,013)
Stock repurchased, net of commissions	$ (8,511)	$ (8,511)
Ending balance (in shares) at Mar. 31, 2021	13,326,509	13,326,509
Ending balance at Mar. 31, 2021	$ 350,292	$ 118,386	$ 225,600	$ 6,306

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends paid on common stock (in dollars per share)	$ 0.23	$ 0.23

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Cash Flows from Operating Activities:
Net income		$ 8,947	$ 7,228
Adjustments to reconcile net income to net cash provided by operating activities:
(Reversal of) provision for credit losses on loans		(2,929)	2,200
(Reversal of) provision for credit losses on unfunded loan commitments		(590)	102
Noncash contribution expense to employee stock ownership plan		332	324
Noncash director compensation expense		162	75
Stock-based compensation expense		615	630
Amortization of core deposit intangible		204	213
Amortization of investment security premiums, net of accretion of discounts		685	(93)
Accretion of (discounts) premiums on acquired loans		(33)	11
Accretion of discount on subordinated debenture		1,347	17
Net change in deferred loan origination costs/fees		2,658	(225)
Gain on sale of investment securities		0	(800)
Depreciation and amortization		459	526
Earnings on bank-owned life insurance policies		(257)	(275)
Net changes in:
Interest receivable and other assets		2,901	293
Interest payable and other liabilities		(2,065)	(701)
Total adjustments		3,489	2,297
Net cash provided by operating activities		12,436	9,525
Cash Flows from Investing Activities:
Purchase of held-to-maturity securities		(41,607)	0
Purchase of available-for-sale securities		(151,828)	(54,902)
Proceeds from sale of available-for-sale securities		0	27,442
Proceeds from paydowns/maturities of held-to-maturity securities		8,600	6,217
Proceeds from paydowns/maturities of available-for-sale securities		16,060	20,924
Loans originated and principal collected, net		(36,543)
Loans originated and principal collected, net			1,117
Purchase of bank-owned life insurance policies		0	(941)
Purchase of premises and equipment		(144)	(146)
Cash paid for low income housing tax credit investment		(313)	(1,251)
Net cash used in investing activities		(205,775)	(1,540)
Cash Flows from Financing Activities:
Net increase (decrease) in deposits		151,950	(29,379)
Proceeds from stock options exercised		38	824
Payment of tax withholdings for vesting of restricted stock		(156)	(73)
Proceeds from stock issued under employee and director stock purchase plans		46	34
Stock repurchased, net of commissions		(8,792)	(3,333)
Repayment of subordinated debenture including execution costs		(4,126)	0
Repayment of finance lease obligations		(28)	(45)
Cash dividends paid on common stock		(3,094)	(3,127)
Net cash provided by (used in) financing activities		135,838	(35,099)
Net decrease in cash, cash equivalents and restricted cash		(57,501)	(27,114)
Cash, cash equivalents and restricted cash at beginning of period		200,320	183,388
Cash, cash equivalents and restricted cash at end of period		142,819	156,274
Supplemental disclosure of cash flow information:
Cash paid in interest		492	1,260
Cash paid in income taxes		0	0
Supplemental disclosure of noncash investing and financing activities:
Change in net unrealized gain or loss on available-for-sale securities		(9,082)	9,812
Amortization of net unrealized loss on available-for-sale securities transferred to held-to-maturity		143	110
Purchase of investment security not yet settled		10,000	0
Stock issued to employee stock ownership plan		332	324
Stock issued in payment of director fees		117	117
Repurchase of stock not yet settled		132	0
Restricted cash	[1]	$ 0	$ 0
[1]	Restricted cash includes reserve requirements held with the Federal Reserve Bank of San Francisco. In response to the COVID-19 pandemic, the Federal Reserve reduced the reserve requirement ratios to zero percent effective March 26, 2020.

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The consolidated financial statements include the accounts of Bank of Marin Bancorp (“Bancorp”), a bank holding company, and its wholly-owned bank subsidiary, Bank of Marin (the “Bank”), a California state-chartered commercial bank. References to “we,” “our,” “us” mean Bancorp and the Bank that are consolidated for financial reporting purposes. The accompanying unaudited consolidated interim financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Certain information and note disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles ("GAAP") have been condensed or omitted pursuant to those rules and regulations. Certain items in prior financial statements have been reclassified to conform to the current presentation. Although we believe that the disclosures are adequate and the information presented is not misleading, we suggest that these interim financial statements be read in conjunction with the annual financial statements and the notes thereto included in our 2020 Annual Report on Form 10-K. In the opinion of management, the unaudited consolidated financial statements reflect all adjustments, which are necessary for a fair presentation of the consolidated financial position, the results of operations, changes in comprehensive income, changes in stockholders’ equity, and cash flows for the periods presented. All material intercompany transactions have been eliminated. The results of these interim periods may not be indicative of the results for the full year or for any other period. The NorCal Community Bancorp Trust II (the "Trust") was formed for the sole purpose of issuing trust preferred securities. Bancorp is not considered the primary beneficiary of the Trust (a variable interest entity), therefore the Trust is not consolidated in our consolidated financial statements, but rather the subordinated debenture is shown as a liability on our consolidated statements of condition. Bancorp's investment in the securities of the Trust is accounted for under the equity method and is included in interest receivable and other assets on the consolidated statements of condition. Refer to Note 6, Borrowings, for additional information on the subordinated debenture due to NorCal Community Bancorp Trust II and the early redemption that occurred on March 15, 2021. The following table shows: 1) weighted average basic shares, 2) potentially dilutive weighted average common shares related to stock options and unvested restricted stock awards, and 3) weighted average diluted shares. Basic earnings per share (“EPS”) are calculated by dividing net income by the weighted average number of common shares outstanding during each period, excluding unvested restricted stock awards. Diluted EPS are calculated using the weighted average number of potentially dilutive common shares. The number of potentially dilutive common shares included in the quarterly diluted EPS is computed using the average market prices during the three months included in the reporting period under the treasury stock method. The number of potentially dilutive common shares included in year-to-date diluted EPS is a year-to-date weighted average of potentially dilutive common shares included in each quarterly diluted EPS computation. In computing diluted EPS, we exclude anti-dilutive shares such as options whose exercise prices exceed the current common stock price, as they would not reduce EPS under the treasury method. We have two forms of outstanding common stock: common stock and unvested restricted stock awards. Holders of unvested restricted stock awards receive non-forfeitable dividends at the same rate as common shareholders and they both share equally in undistributed earnings. Under the two-class method, the difference in EPS is nominal for these participating securities. Three months ended (in thousands, except per share data) March 31, 2021 March 31, 2020 Weighted average basic common shares outstanding 13,363 13,525 Potentially dilutive common shares related to: Stock options 81 106 Unvested restricted stock awards 25 25 Weighted average diluted shares outstanding 13,469 13,656 Net income $ 8,947 $ 7,228 Basic EPS $ 0.67 $ 0.53 Diluted EPS $ 0.66 $ 0.53 Weighted average anti-dilutive common shares not included in the calculation of diluted EPS 80 70

Recently Adopted and Issued Acc

Recently Adopted and Issued Accounting Standards	3 Months Ended
	Mar. 31, 2021
Accounting Standards Update and Change in Accounting Principle [Abstract]
Recently Adopted and Issued Accounting Standards	Recently Adopted and Issued Accounting Standards Accounting Standards Adopted in 2021 In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (ASC Topic 740): Simplifying the Accounting for Income Taxes . This ASU is intended to reduce the cost and complexity related to accounting for income taxes by removing certain exceptions to the guidance in ASC 740 related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and simplifying aspects of the accounting for franchise taxes and enacted changes in tax laws or rates. We adopted this ASU prospectively on January 1, 2021, which did not have a material impact on our financial condition or results of operations. In January 2020, the FASB issued ASU No. 2020-01, Investments - Equity Securities (ASC Topic 321), Investments - Equity Method and Joint Ventures (ASC Topic 323), and Derivatives and Hedging (ASC Topic 815) - Clarifying the Interactions between ASC 321, ASC 323, and ASC 815 . Among other things, this ASU clarifies that a company should consider observable transactions that require a company to either apply or discontinue the equity method of accounting under ASC 323, for the purposes of applying the measurement alternative in accordance with ASC 321. We adopted this ASU prospectively on January 1, 2021, which did not have a material impact on our financial condition or results of operations. In October 2020, the FASB issued ASU No. 2020-08, Codification Improvements to Subtopic 310-20, Receivables—Nonrefundable Fees and Other Costs . This ASU was issued as part of the Board's ongoing project to improve codification or correct unintended application. This ASU adds clarification to ASU 2017-08, which the Bank early-adopted in 2017, and delineates whether an entity with callable debt securities that have multiple call dates should amortize the amount above that which is repayable, to the next call date. We adopted this ASU prospectively on January 1, 2021. Because this ASU was narrow in scope and for clarification purposes, it did not have a material impact on our financial condition and results of operations. Accounting Standards Not Yet Effective In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848) . The amendments in this ASU are elective and provide optional guidance for a limited period of time to ease the potential burden of accounting for, or recognizing the effects of reference rate reform. The amendments in this ASU provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The amendments in this ASU may be elected as of March 12, 2020 through December 31, 2022. An entity may choose to elect the amendments in this update at an interim period subsequent to March 12, 2020 with adoption methods varying based on transaction type. We have not elected to apply amendments at this time, however, will assess the applicability of this ASU to us as we continue to monitor guidance for reference rate reform from FASB and its impact on our financial condition and results of operations. In January 2021, the FASB issued ASU No. 2021-01, Reference Rate Reform (Topic 848). The main amendments in this ASU are intended to clarify certain optional expedients and scope of derivative instruments. The amendments are elective and effective immediately upon issuance of this ASU. Amendments may be elected through December 31, 2022. We have not elected to apply amendments at this time, however, will assess the applicability of this ASU to us as we continue to monitor guidance for reference rate reform from FASB and its impact on our financial condition and results of operations.

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities	Fair Value of Assets and Liabilities Fair Value Hierarchy and Fair Value Measurement We group our assets and liabilities that are measured at fair value in three levels within the fair value hierarchy, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are: Level 1: Valuations are based on unadjusted quoted prices in active markets for identical assets or liabilities. Level 2: Valuations are based on quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuations for which all significant assumptions are observable or can be corroborated by observable market data. Level 3: Valuations are based on unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Values are determined using pricing models and discounted cash flow models and may include significant management judgment and estimation. The following table summarizes our assets and liabilities that were required to be recorded at fair value on a recurring basis. (in thousands) Description of Financial Instruments Carrying Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs Measurement Categories: Changes in Fair Value Recorded In 1 March 31, 2021 Securities available-for-sale: Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies $ 287,323 $ — $ 287,323 $ — OCI SBA-backed securities 29,218 — 29,218 — OCI Debentures of government sponsored agencies 74,473 — 74,473 — OCI Obligations of state and political subdivisions 121,765 — 121,765 — OCI Corporate bonds 5,789 — 5,789 — OCI Derivative financial liabilities (interest rate contracts) 1,193 — 1,193 — NI December 31, 2020 Securities available-for-sale: Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies $ 228,651 $ — $ 228,651 $ — OCI SBA-backed securities 32,862 — 36,286 — OCI Debentures of government sponsored agencies 20,186 — 20,186 — OCI Obligations of state and political subdivisions 110,652 — 110,652 — OCI Derivative financial liabilities (interest rate contracts) 1,912 — 1,912 — NI 1 Other comprehensive income ("OCI") or net income ("NI"). Available-for-sale securities are recorded at fair value on a recurring basis. When available, quoted market prices (Level 1) are used to determine the fair value of available-for-sale securities. If quoted market prices are not available, we obtain pricing information from a reputable third-party service provider, who may utilize valuation techniques that use current market-based or independently sourced parameters, such as bid/ask prices, dealer-quoted prices, interest rates, benchmark yield curves, prepayment speeds, probability of default, loss severity and credit spreads (Level 2). Level 2 securities include obligations of state and political subdivisions, U.S. agencies or government-sponsored agencies' debt securities, mortgage-backed securities, government agency-issued, privately-issued collateralized mortgage obligations, and corporate bonds. As of March 31, 2021 and December 31, 2020, there were no Level 1 or Level 3 securities. Held-to-maturity securities may be written down to fair value as a result of impairment through a provision for credit losses in investments securities. We did not record any write-downs during the three months ended March 31, 2021 or March 31, 2020. Fair value of held-to-maturity securities is determined using the same techniques discussed above for available-for-sale securities. On a recurring basis, derivative financial instruments are recorded at fair value, which is based on the income approach using observable Level 2 market inputs, reflecting market expectations of future interest rates as of the measurement date. Standard valuation techniques are used to calculate the present value of the future expected cash flows assuming an orderly transaction. Valuation adjustments may be made to reflect both our own credit risk and the counterparties’ credit risk in determining the fair value of the derivatives. Level 2 inputs for the valuations are limited to observable market prices for London Interbank Offered Rate ("LIBOR") and Overnight Index Swap ("OIS") rates (for the very short term), quoted prices for LIBOR futures contracts, observable market prices for LIBOR and OIS swap rates, and one-month and three-month LIBOR basis spreads at commonly quoted intervals. Mid-market pricing of the inputs is used as a practical expedient in the fair value measurements. We project spot rates at reset days specified by each swap contract to determine future cash flows, then discount to present value using OIS curves as of the measurement date. When the value of any collateral placed with counterparties is less than the interest rate derivative liability, a credit valuation adjustment ("CVA") is applied to reflect the credit risk we pose to counterparties. We have used the spread between the Standard & Poor's BBB rated U.S. Bank Composite rate and LIBOR for the closest maturity term corresponding to the duration of the swaps to derive the CVA. A similar credit risk adjustment, correlated to the credit standing of the counterparty, is made when collateral posted by the counterparty does not fully cover their liability to us. For further discussion on our methodology in valuing our derivative financial instruments, refer to Note 9, Derivative Financial Instruments and Hedging Activities. Certain financial assets may be measured at fair value on a non-recurring basis. These assets are subject to fair value adjustments that result from the application of the lower of cost or fair value accounting or write-downs of individual assets, such as impaired loans that are collateral dependent and other real estate owned ("OREO"). As of March 31, 2021 and December 31, 2020, we did not carry any assets measured at fair value on a non-recurring basis. Disclosures about Fair Value of Financial Instruments The table below is a summary of fair value estimates for financial instruments as of March 31, 2021 and December 31, 2020, excluding financial instruments recorded at fair value on a recurring basis (summarized in the first table in this note). The carrying amounts in the following table are recorded in the consolidated statements of condition under the indicated captions. Further, we have not disclosed the fair value of financial instruments specifically excluded from disclosure requirements such as bank-owned life insurance policies ("BOLI") and non-maturity deposit liabilities. Additionally, we held shares of Federal Home Loan Bank ("FHLB") of San Francisco stock and Visa Inc. Class B common stock, both recorded at cost, as there was no impairment or changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer as of March 31, 2021 or December 31, 2020. The values are discussed in Note 4, Investment Securities. March 31, 2021 December 31, 2020 (in thousands) Carrying Amounts Fair Value Fair Value Hierarchy Carrying Amounts Fair Value Fair Value Hierarchy Financial assets (recorded at amortized cost) Cash and cash equivalents $ 142,819 $ 142,819 Level 1 $ 200,320 $ 200,320 Level 1 Investment securities held-to-maturity 151,970 156,756 Level 2 109,036 115,185 Level 2 Loans, net 2,101,814 2,114,691 Level 3 2,065,682 2,089,192 Level 3 Interest receivable 10,589 10,589 Level 2 10,922 10,922 Level 2 Financial liabilities (recorded at amortized cost) Time deposits 94,955 95,241 Level 2 97,433 97,769 Level 2 Subordinated debenture — — Level 3 2,777 3,115 Level 3 Interest payable 59 59 Level 2 97 97 Level 2 Fair value of loans is based on exit price techniques and obtained from an independent third-party that uses its proprietary valuation model and methodology and may not reflect actual or prospective market valuations. The discounted cash flow valuation approach reflects key inputs and assumptions such as loan probability of default, loss given default, prepayment speed, and market discount rates. Fair value of fixed-rate time deposits is estimated by discounting future contractual cash flows using discount rates that reflect the current market rates offered for time deposits of similar remaining maturities. Fair value of the subordinated debenture is estimated using a discounted cash flow approach based on current interest rates for similar financial instruments adjusted for credit and liquidity spreads. The value of unrecognized financial instruments is estimated based on the fee income associated with the commitments which, in the absence of credit exposure, is considered to approximate their settlement value. The fair value of commitment fees was not material as of March 31, 2021 or December 31, 2020.

Investment Securities

Investment Securities	3 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities Our investment securities portfolio consists of obligations of state and political subdivisions, U.S. Corporations, U.S. federal government agencies such as Government National Mortgage Association ("GNMA") and Small Business Administration ("SBA"), U.S. government-sponsored enterprises ("GSEs"), such as Federal National Mortgage Association ("FNMA"), Federal Home Loan Mortgage Corporation ("FHLMC"), Federal Farm Credit Banks Funding Corporation and FHLB. We also invest in residential and commercial mortgage-backed securities (“MBS”/"CMBS") and collateralized mortgage obligations (“CMOs”) issued or guaranteed by the GSEs, as reflected in the following table. A summary of the amortized cost, fair value and allowance for credit losses related to securities held-to-maturity as of March 31, 2021 and December 31, 2020 is presented below. Held-to-maturity: Amortized Cost 1 Allowance for Credit Losses Net Carrying Amount Gross Unrealized Fair Value (in thousands) Gains (Losses) March 31, 2021 Securities of U.S. government-sponsored enterprises: MBS pass-through securities issued by FHLMC and FNMA $ 78,227 $ — $ 78,227 $ 3,283 $ — $ 81,510 CMOs issued by FHLMC 30,207 — 30,207 1,105 (189) 31,123 CMOs issued by FNMA 7,305 — 7,305 347 — 7,652 SBA-backed securities 5,699 — 5,699 227 — 5,926 Debentures of government-sponsored agencies 29,950 — 29,950 — — 29,950 Obligations of state and political subdivisions 582 — 582 13 — 595 Total held-to-maturity $ 151,970 $ — $ 151,970 $ 4,975 $ (189) $ 156,756 December 31, 2020 Securities of U.S. government-sponsored enterprises: MBS pass-through securities issued by FHLMC and FNMA $ 65,579 $ — $ 65,579 $ 3,924 $ — $ 69,503 CMOs issued by FHLMC 27,201 — 27,201 1,441 — 28,642 CMOs issued by FNMA 8,042 — 8,042 363 — 8,405 SBA-backed securities 6,547 — 6,547 400 — 6,947 Obligations of state and political subdivisions 1,667 — 1,667 21 — 1,688 Total held-to-maturity $ 109,036 $ — $ 109,036 $ 6,149 $ — $ 115,185 1 Amortized cost and fair values exclude accrued interest receivable of $295 thousand and $366 thousand at March 31, 2021 and December 31, 2020, respectively, which is included in interest receivable and other assets in the consolidated statements of condition. Management measures expected credit losses on held-to-maturity securities on a collective basis by major security type with each type sharing similar risk characteristics, and considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. With regard to MBSs and CMOs issued or guaranteed by the GSEs, and SBA-backed securities, we expect to receive all the contractual principal and interest on these securities as such securities are backed by the full faith and credit of and/or guaranteed by the U.S. government. Accordingly, no allowance for credit losses has been recorded for these securities. With regard to securities issued by states and political subdivisions, management considers (i) issuer and/or guarantor credit ratings, (ii) historical probability of default and loss given default rates for given bond ratings and remaining maturity,(iii) whether issuers continue to make timely principal and interest payments under the contractual terms of the securities, (iv) internal credit review of the financial information, and (v) whether or not such securities have credit enhancements such as guarantees, contain a defeasance clause, or are pre-refunded by the issuers. Based on the comprehensive analysis, no credit losses are expected. The following table summarizes the amortized cost of our portfolio of held-to-maturity securities issued by states and political subdivisions by Moody's and/or Standard & Poor's bond ratings as of March 31, 2021. (in thousands) Obligations of state and political subdivisions AA $ 377 A 205 Total $ 582 A summary of the amortized cost, fair value and allowance for credit losses related to securities available-for-sale as of March 31, 2021 and December 31, 2020 is presented below. Available-for-sale: Amortized Cost 1 Gross Unrealized Allowance for Credit Losses Fair Value (in thousands) Gains (Losses) March 31, 2021 Securities of U.S. government-sponsored enterprises: MBS pass-through securities issued by FHLMC and FNMA $ 65,871 $ 2,199 $ (56) $ — $ 68,014 CMOs issued by FHLMC 168,589 5,525 (948) — 173,166 CMOs issued by FNMA 21,663 537 (31) — 22,169 CMOs issued by GNMA 23,738 236 — — 23,974 SBA-backed securities 28,059 1,212 (53) — 29,218 Debentures of government- sponsored agencies 76,313 201 (2,041) — 74,473 Obligations of state and political subdivisions 118,118 3,842 (195) — 121,765 Corporate bonds 5,986 — (197) — 5,789 Total available-for-sale $ 508,337 $ 13,752 $ (3,521) $ — $ 518,568 December 31, 2020 Securities of U.S. government-sponsored enterprises: MBS pass-through securities issued by FHLMC and FNMA $ 50,686 $ 2,530 $ — $ — $ 53,216 CMOs issued by FHLMC 143,267 7,925 (1) — 151,191 CMOs issued by FNMA 16,450 580 — — 17,030 CMOs issued by GNMA 6,863 351 — — 7,214 SBA-backed securities 30,941 1,976 (55) — 32,862 Debentures of government- sponsored agencies 19,944 266 (24) — 20,186 Obligations of state and political subdivisions 104,887 5,765 — — 110,652 Total available-for-sale $ 373,038 $ 19,393 $ (80) $ — $ 392,351 1 Amortized cost and fair value exclude accrued interest receivable of $1.9 million at both March 31, 2021 and December 31, 2020, which is included in interest receivable and other assets in the consolidated statements of condition. The amortized cost a nd fair value of investment debt securities by contractual maturity at March 31, 2021 and December 31, 2020 are shown below. Expected maturities may differ from contractual maturities if the issuers of the securities have the right to call or prepay obligations with or without call or prepayment penalties. March 31, 2021 December 31, 2020 Held-to-Maturity Available-for-Sale Held-to-Maturity Available-for-Sale (in thousands) Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Within one year $ 246 $ 248 $ 15,013 $ 15,219 $ 246 $ 250 $ 11,530 $ 11,687 After one but within five years 8,847 9,284 55,101 57,955 7,550 7,961 59,028 62,397 After five years through ten years 62,415 65,241 193,424 198,301 52,113 55,872 144,908 154,089 After ten years 80,462 81,983 244,799 247,093 49,127 51,102 157,572 164,178 Total $ 151,970 $ 156,756 $ 508,337 $ 518,568 $ 109,036 $ 115,185 $ 373,038 $ 392,351 Sales of investment securities and gross gains and losses are shown in the following table: Three months ended (in thousands) March 31, 2021 March 31, 2020 Available-for-sale: Sales proceeds $ — $ 27,442 Gross realized gains — 800 Pledged investment securities are shown in the following table: (in thousands) March 31, 2021 December 31, 2020 Pledged to the State of California: Secure public deposits in compliance with the Local Agency Security Program $ 123,085 $ 131,051 Collateral for trust deposits 735 751 Total investment securities pledged to the State of California 123,820 131,802 Collateral for Wealth Management and Trust Services checking account 614 629 Total pledged investment securities $ 124,434 $ 132,431 There were 29 and 10 securities in unrealized loss positions at March 31, 2021 and December 31, 2020, respectively. Those securities are summarized and classified according to the duration of the loss period in the tables below: March 31, 2021 < 12 continuous months ≥ 12 continuous months Total securities (in thousands) Fair value Unrealized loss Fair value Unrealized loss Fair value Unrealized loss Held-to-maturity: CMOs issued by FHLMC $ 4,235 $ (189) $ — $ — $ 4,235 $ (189) Total held-to-maturity 4,235 (189) — — 4,235 (189) Available-for-sale: MBS pass-through securities issued by FHLMC and FNMA 10,013 (56) — — 10,013 (56) SBA-backed securities — — 1,699 (53) 1,699 (53) CMOs issued by FNMA 7,304 (31) — — 7,304 (31) CMOs issued by FHLMC 32,658 (948) — — 32,658 (948) Debentures of government- sponsored agencies 53,289 (2,041) — — 53,289 (2,041) Obligations of state and political subdivisions 28,529 (195) — — 28,529 (195) Corporate bonds 5,789 (197) — — 5,789 (197) Total available-for-sale 137,582 (3,468) 1,699 (53) 139,281 (3,521) Total temporarily impaired securities $ 141,817 $ (3,657) $ 1,699 $ (53) $ 143,516 $ (3,710) December 31, 2020 < 12 continuous months ≥ 12 continuous months Total securities (in thousands) Fair value Unrealized loss Fair value Unrealized loss Fair value Unrealized loss Available-for-sale: SBA-backed securities $ — $ — $ 1,790 $ (55) $ 1,790 $ (55) CMOs issued by FHLMC 5,975 (1) — — 5,975 (1) Debentures of government- sponsored agencies 3,943 (24) — — 3,943 (24) Total available-for-sale 9,918 (25) 1,790 (55) 11,708 (80) Total temporarily impaired securities $ 9,918 $ (25) $ 1,790 $ (55) $ 11,708 $ (80) As of March 31, 2021, the investment portfolio included 5 investment securities that had been in a continuous loss position for twelve months or more and 24 investment securities that had been in a loss position for less than twelve months. Securities issued by government-sponsored agencies, such as FNMA and FHLMC, usually have implicit credit support by the U.S. federal government. However, since 2008, FNMA and FHLMC have been under government conservatorship and, therefore, contractual cash flows for these investments carry explicit guarantees by the U.S. federal government. Securities issued by the SBA and GNMA have explicit credit guarantees by the U.S. federal government, which protects us from credit losses on the contractual cash flows of the securities. Our investment in obligations of state and political subdivisions bonds are deemed credit worthy after our comprehensive analysis of the issuers' latest financial information, credit ratings by major credit agencies, and/or credit enhancements. At March 31, 2021, management determined that it did not intend to sell any investment securities with unrealized losses, and it is more likely than not that we will not be required to sell securities with unrealized losses before recovery of their amortized cost. Therefore, no allowances for credit losses has been recognized on available for sale securities in an unrealized loss position as management does not believe any of the securities are impaired due to reasons of credit quality at March 31, 2021. Non-Marketable Securities Included in Other Assets FHLB Capital Stock As a member of the FHLB, we are required to maintain a minimum investment in FHLB capital stock determined by the Board of Directors of the FHLB. The minimum investment requirements can increase in the event we increase our total asset size or borrowings with the FHLB. Shares cannot be purchased or sold except between the FHLB and its members at the $100 per share par value. We held $11.9 million of FHLB stock included in other assets on the consolidated statements of condition at both March 31, 2021 and December 31, 2020. The carrying amounts of these investments are reasonable estimates of fair value because the securities are restricted to member banks and they do not have a readily determinable market value. Based on our analysis of FHLB's financial condition and certain qualitative factors, we determined that the FHLB stock was not impaired at March 31, 2021 and December 31, 2020. On April 29, 2021, FHLB announced a cash dividend for the first quarter of 2021 at an annualized dividend rate of 6.00% to be distributed in mid-May 2021. Cash dividends paid on FHLB capital stock are recorded as non-interest income. VISA Inc. Class B Common Stock As a member bank of Visa U.S.A., we held 10,439 shares of Visa Inc. Class B common stock at March 31, 2021 and December 31, 2020. These shares have a carrying value of zero and are restricted from resale to non-member banks of Visa U.S.A. until their conversion into Class A (voting) shares upon the termination of Visa Inc.'s Covered Litigation escrow account. Because of the restriction and the uncertainty on the conversion rate to Class A shares, these shares lack a readily determinable fair value. When converting this Class B common stock to Class A common stock based on the estimated conversion rate of 1.6228 both at March 31, 2021 and December 31, 2020, and the closing stock price of Class A shares at those respective dates, the converted value of our shares of Class B common stock would have been $3.6 million and $3.7 million at March 31, 2021 and December 31, 2020, respectively. The conversion rate is subject to further adjustment upon the final settlement of the covered litigation against Visa Inc. and its member banks. As such, the fair value of these Class B shares can differ significantly from their converted values. For further information, refer to Note 8, Commitments and Contingencies. Low Income Housing Tax Credits We invest in low-income housing tax credit funds as a limited partner, which totaled $3.4 million and $3.5 million recorded in other assets as of March 31, 2021 and December 31, 2020, respectively. In the first three months of 2021, we recognized $160 thousand of low-income housing tax credits and other tax benefits, offset by $135 thousand of amortization expense of low-income housing tax credit investment, as a component of income tax expense. As of March 31, 2021, our unfunded commitments for these low-income housing tax credit funds totaled $508 thousand. We did not recognize any impairment losses on these low-income housing tax credit investments during the first three months of 2021 or 2020, as the value of the future tax benefits exceeds the carrying value of the investments.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Loans and Allowance for Credit Losses	Loans and Allowance for Credit Losses Under the accounting relief provisions of the Coronavirus Aid, Relief and Economic Security ("CARES") Act passed in March 2020, we postponed the adoption of the CECL standard form January 1, 2020 to December 31, 2020. Upon adoption we used a modified retrospective method effective October 1, 2020 (the beginning of the first reporting period in which the standard was effective due to the postponement of CECL) through a cumulative adjustment to retained earnings. The cumulative adjustment to retained earnings was recorded, net of taxes, based on economic forecasts and other assumptions as of December 31, 2019. Results for reporting periods beginning after September 30, 2020 have been presented under the new standard while prior period amounts continue to be reported in accordance with previously applicable GAAP. Certain prior period credit quality disclosures related to impaired loans and individually and collectively evaluated loans were superseded with the CECL accounting standards and have not been included below. Refer to Notes 1 and 3 under Part II, Item 8, of our 2020 Form 10-K for for additional information regarding the adoption of CECL. In addition, refer to Note 5 under Part I, Item 1, of our March 31, 2020 Form 10-Q for prior period information. The following table presents the amortized cost of loans by class as of March 31, 2021 and December 31, 2020. (in thousands) March 31, 2021 December 31, 2020 Commercial and industrial $ 545,069 $ 498,408 Real estate: Commercial owner-occupied 308,266 304,963 Commercial investor-owned 955,021 961,208 Construction 71,066 73,046 Home equity 96,575 104,813 Other residential 124,383 123,395 Installment and other consumer loans 21,392 22,723 Total loans, at amortized cost 1 2,121,772 2,088,556 Allowance for credit losses on loans (19,958) (22,874) Total loans, net $ 2,101,814 $ 2,065,682 1 Amortized cost includes net deferred loan origination fees of $(6.7) million and $(4.9) million at March 31, 2021 and December 31, 2020, respectively. Amounts are also net of unrecognized purchase discounts of $782 thousand and $815 thousand at March 31, 2021 and December 31, 2020, respectively. Amortized cost excludes accrued interest, which totaled $8.5 million and $8.8 million at March 31, 2021 and December 31, 2020, respectively, and is included in interest receivable and other assets in the consolidated statements of condition. Lending Risks Commercial and Industrial Loans - Commercial loans are generally made to established small and mid-sized businesses to provide financing for their growth and working capital needs, equipment purchases and acquisitions. Management examines historical, current, and projected cash flows to determine the ability of the borrower to repay obligations as agreed. Commercial loans are made based primarily on the identified cash flows of the borrower and secondarily on the underlying collateral and guarantor support. The cash flows of borrowers, however, may not occur as expected, and the collateral securing these loans may fluctuate in value. Most commercial and industrial loans are secured by the assets being financed, such as accounts receivable and inventory, and typically include personal guarantees. We target stable businesses with guarantors who provide additional sources of repayment and have proven to be resilient in periods of economic stress. A weakened economy, and resultant decreased consumer and/or business spending, may have an effect on the credit quality of commercial loans. In April 2020, the Bank began participating in the Small Business Administration's ("SBA") Paycheck Protection Program ("PPP"). As of March 31, 2021, there were 2,513 PPP loans outstanding. PPP loans totaling $365.0 million (net of $8.0 million in unrecognized fees and costs) and $291.6 million (net of $5.4 million in unrecognized fees and costs) as of March 31, 2021 and December 31, 2020, respectively, were included in commercial and industrial loan balances. Of the PPP loans outstanding as of March 31, 2021, 841 loans totaling $119.5 million funded during the first quarter of 2021 under the second round of the PPP stimulus plan. PPP loans have terms of two to five years and earn interest at 1%. In addition, the SBA paid the Bank a fee of 1%-5% depending on the loan amount, which was netted with loan origination costs and accreted/amortized into interest income using the effective yield method over the contractual life of each loan. The recognition of fees and costs is accelerated when the SBA forgives the loan and/or the loan is paid off prior to maturity. PPP loans are fully guaranteed by the SBA and have virtually no risk of loss. We expect the vast majority of the PPP loans to be fully forgiven by the SBA. Commercial Real Estate Loans - Commercial real estate loans, which include income producing investment properties and owner-occupied real estate used for business purposes, are subject to underwriting standards and processes similar to commercial loans discussed above. We underwrite these loans to be repaid from cash flow and to be supported by real property collateral. Underwriting standards for commercial real estate loans include, but are not limited to, debt coverage and loan-to-value ratios. Furthermore, a large majority of our loans are guaranteed by the owners of the properties. Conditions in the real estate markets or downturn in the general economy may adversely affect our commercial real estate loans. In the event of a vacancy, we expect guarantors to carry the loans until they find a replacement tenant. The owner's substantial equity investment provides a strong economic incentive to continue to support the commercial real estate projects. As such, we have generally experienced a relatively low level of loss and delinquencies in this portfolio. Construction Loans - Construction loans are generally made to developers and builders to finance construction, renovation and occasionally land acquisitions in anticipation of near-term development. Construction loans include interest reserves that are used for the payment of interest during the development and marketing periods and are capitalized as part of the loan balance. When a construction loan is placed on nonaccrual status before the depletion of the interest reserve, we apply the interest funded by the interest reserve against the loan's principal balance. These loans are underwritten after evaluation of the borrower's financial strength, reputation, prior track record, and independent appraisals. We monitor all construction projects to determine whether they are on schedule, completed as planned and in accordance with the approved construction budgets. Significant events can affect the construction industry, including: the inherent volatility of real estate markets and vulnerability to delays due to weather, change orders, inability to obtain construction permits, labor or material shortages, and price changes. Estimates of construction costs and value associated with the completed project may be inaccurate. Repayment of construction loans is largely dependent on the ultimate success of the project. Consumer Loans - Consumer loans primarily consist of home equity lines of credit, other residential loans and floating homes along with a small number of installment loans. Our other residential loans include tenancy-in-common fractional interest loans ("TIC") located almost entirely in San Francisco County. We originate consumer loans utilizing credit score information, debt-to-income ratio and loan-to-value ratio analysis. Diversification among consumer loan types, coupled with relatively small loan amounts that are spread across many individual borrowers, mitigates risk. We do not originate sub-prime residential mortgage loans, nor is it our practice to underwrite loans commonly referred to as "Alt-A mortgages," the characteristics of which are reduced documentation, borrowers with low FICO scores or collateral with high loan-to-value ratios. Credit Quality Indicators We use a risk rating system to evaluate asset quality, and to identify and monitor credit risk in individual loans, and in the loan portfolio. Our definitions of “Special Mention” risk graded loans, or worse, are consistent with those used by the Federal Deposit Insurance Corporation ("FDIC"). Our internally assigned grades are as follows: Pass and Watch - Loans to borrowers of acceptable or better credit quality. Borrowers in this category demonstrate fundamentally sound financial positions, repayment capacity, credit history and management expertise. Loans in this category must have an identifiable and stable source of repayment and meet the Bank’s policy regarding debt-service-coverage ratios. These borrowers are capable of sustaining normal economic, market or operational setbacks without significant financial consequences. Negative external industry factors are generally not present. The loan may be secured, unsecured or supported by non-real estate collateral for which the value is more difficult to determine and/or marketability is more uncertain. This category also includes “Watch” loans, where the primary source of repayment has been delayed. “Watch” is intended to be a transitional grade, with either an upgrade or downgrade within a reasonable period. Special Mention - Potential weaknesses that deserve close attention. If left uncorrected, those potential weaknesses may result in deterioration of the payment prospects for the asset. Special Mention assets do not present sufficient risk to warrant adverse classification. Substandard - Inadequately protected by either the current sound worth and paying capacity of the obligor or the collateral pledged, if any. A Substandard asset has a well-defined weakness or weaknesses that jeopardize(s) the liquidation of the debt. Substandard assets are characterized by the distinct possibility that we will sustain some loss if such weaknesses or deficiencies are not corrected. Well-defined weaknesses include adverse trends or developments of the borrower’s financial condition, managerial weaknesses and/or significant collateral deficiencies. Doubtful - Critical weaknesses that make collection or liquidation in full improbable. There may be specific pending events that work to strengthen the asset; however, the amount or timing of the loss may not be determinable. Pending events generally occur within one year of the asset being classified as Doubtful. Examples include: merger, acquisition, or liquidation; capital injection; guarantee; perfecting liens on additional collateral; and refinancing. Such loans are placed on non-accrual status and usually are collateral-dependent. We regularly review our credits for accuracy of risk grades whenever we receive new information. Borrowers are generally required to submit financial information at regular intervals. Typically, commercial borrowers with lines of credit are required to submit financial information with reporting intervals ranging from monthly to annually depending on credit size, risk and complexity. In addition, investor commercial real estate borrowers with loans exceeding a certain dollar threshold are usually required to submit rent rolls or property income statements annually. We monitor construction loans monthly. We review home equity and other consumer loans based on delinquency. We also review loans graded “Watch” or worse, regardless of loan type, no less than quarterly. The following tables present the loan portfolio by loan class, origination year and internal risk rating as of March 31, 2021 and December 31, 2020. Generally, existing term loans that were re-underwritten are reflected in the table in the year of renewal. Lines of credit that have a conversion feature at the time of origination, such as construction to perm loans, are presented by year of origination. (in thousands) Term Loans - Amortized Cost by Origination Year Revolving Loans Amortized Cost March 31, 2021 2021 2020 2019 2018 2017 Prior Total Commercial and industrial: Pass $ 116,598 $ 264,838 $ 21,201 $ 11,692 $ 4,111 $ 36,865 $ 76,742 $ 532,047 Special Mention — — 812 598 115 8 8,954 10,487 Substandard — 1,649 390 — — — 496 2,535 Total commercial and industrial $ 116,598 $ 266,487 $ 22,403 $ 12,290 $ 4,226 $ 36,873 $ 86,192 $ 545,069 Commercial real estate, owner-occupied: Pass $ 10,035 $ 30,459 $ 27,147 $ 41,816 $ 41,962 $ 110,896 $ — $ 262,315 Special Mention — — — 2,363 17,076 12,863 — 32,302 Substandard — 7,147 297 — — 6,205 — 13,649 Total commercial real estate, owner-occupied $ 10,035 $ 37,606 $ 27,444 $ 44,179 $ 59,038 $ 129,964 $ — $ 308,266 Commercial real estate, investor-owned: Pass $ 29,585 $ 161,213 $ 146,537 $ 170,153 $ 87,813 $ 336,840 $ 110 $ 932,251 Special Mention — — 6,808 — 1,811 4,581 — 13,200 Substandard — — 2,715 4,428 — 2,427 — 9,570 Total commercial real estate, investor-owned $ 29,585 $ 161,213 $ 156,060 $ 174,581 $ 89,624 $ 343,848 $ 110 $ 955,021 Construction: Pass $ 6,533 $ 29,510 $ 26,108 $ 8,915 $ — $ — $ — $ 71,066 Special Mention — — — — — — — — Substandard — — — — — — — — Total construction $ 6,533 $ 29,510 $ 26,108 $ 8,915 $ — $ — $ — $ 71,066 Home equity: Pass $ — $ — $ — $ — $ — $ 793 $ 95,115 $ 95,908 Special Mention — — — — — — — — Substandard — — — — — 388 279 667 Total home equity $ — $ — $ — $ — $ — $ 1,181 $ 95,394 $ 96,575 Other residential: Pass $ 5,524 $ 33,498 $ 29,371 $ 23,363 $ 10,520 $ 22,107 $ — $ 124,383 Special Mention — — — — — — — — Substandard — — — — — — — — Total other residential $ 5,524 $ 33,498 $ 29,371 $ 23,363 $ 10,520 $ 22,107 $ — $ 124,383 Installment and other consumer: Pass $ 1,757 $ 2,169 $ 3,334 $ 3,076 $ 1,260 $ 8,111 $ 1,685 $ 21,392 Special Mention — — — — — — — — Substandard — — — — — — — — Total installment and other consumer $ 1,757 $ 2,169 $ 3,334 $ 3,076 $ 1,260 $ 8,111 $ 1,685 $ 21,392 (in thousands) Term Loans - Amortized Cost by Origination Year Revolving Loans Amortized Cost March 31, 2021 2021 2020 2019 2018 2017 Prior Total Total loans: Pass $ 170,032 $ 521,687 $ 253,698 $ 259,015 $ 145,666 $ 515,612 $ 173,652 $ 2,039,362 Total Special Mention $ — $ — $ 7,620 $ 2,961 $ 19,002 $ 17,452 $ 8,954 $ 55,989 Total Substandard $ — $ 8,796 $ 3,402 $ 4,428 $ — $ 9,020 $ 775 $ 26,421 Totals $ 170,032 $ 530,483 $ 264,720 $ 266,404 $ 164,668 $ 542,084 $ 183,381 $ 2,121,772 (in thousands) Term Loans - Amortized Cost by Origination Year Revolving Loans Amortized Cost December 31, 2020 2020 2019 2018 2017 2016 Prior Total Commercial and industrial: Pass $ 308,237 $ 22,589 $ 12,596 $ 4,508 $ 5,915 $ 34,282 $ 85,889 $ 474,016 Special Mention — 2,034 1,318 141 11 49 19,092 22,645 Substandard 1,747 — — — — — — 1,747 Total commercial and industrial $ 309,984 $ 24,623 $ 13,914 $ 4,649 $ 5,926 $ 34,331 $ 104,981 $ 498,408 Commercial real estate, owner-occupied: Pass $ 31,029 $ 27,581 $ 32,603 $ 43,843 $ 12,768 $ 101,014 $ — $ 248,838 Special Mention — — 11,764 17,062 7,343 6,601 — 42,770 Substandard 7,147 — — — 6,208 — — 13,355 Total commercial real estate, owner-occupied $ 38,176 $ 27,581 $ 44,367 $ 60,905 $ 26,319 $ 107,615 $ — $ 304,963 Commercial real estate, investor-owned: Pass $ 162,300 $ 144,751 $ 173,955 $ 100,842 $ 94,862 $ 253,611 $ 117 $ 930,438 Special Mention — 10,695 — 1,819 — 8,124 — 20,638 Substandard — 2,716 4,435 — 1,553 1,428 — 10,132 Total commercial real estate, investor-owned $ 162,300 $ 158,162 $ 178,390 $ 102,661 $ 96,415 $ 263,163 $ 117 $ 961,208 Construction: Pass $ 31,654 $ 30,150 $ 11,242 $ — $ — $ — $ — $ 73,046 Special Mention — — — — — — — — Substandard — — — — — — — — Total construction $ 31,654 $ 30,150 $ 11,242 $ — $ — $ — $ — $ 73,046 Home equity: Pass $ — $ — $ — $ — $ 128 $ 694 $ 102,614 $ 103,436 Special Mention — — — — — — 799 799 Substandard — — — — — 391 187 578 Total home equity $ — $ — $ — $ — $ 128 $ 1,085 $ 103,600 $ 104,813 Other residential: Pass $ 34,447 $ 31,079 $ 23,673 $ 10,574 $ 6,035 $ 17,587 $ — $ 123,395 Special Mention — — — — — — — — Substandard — — — — — — — — Total other residential $ 34,447 $ 31,079 $ 23,673 $ 10,574 $ 6,035 $ 17,587 $ — $ 123,395 Installment and other consumer: Pass $ 2,361 $ 4,382 $ 3,483 $ 1,543 $ 3,423 $ 4,921 $ 2,593 $ 22,706 Special Mention — — — — — — — — Substandard — — — 17 — — — 17 Total installment and other consumer $ 2,361 $ 4,382 $ 3,483 $ 1,560 $ 3,423 $ 4,921 $ 2,593 $ 22,723 Total loans: Pass $ 570,028 $ 260,532 $ 257,552 $ 161,310 $ 123,131 $ 412,109 $ 191,213 $ 1,975,875 Total Special Mention $ — $ 12,729 $ 13,082 $ 19,022 $ 7,354 $ 14,774 $ 19,891 $ 86,852 Total Substandard $ 8,894 $ 2,716 $ 4,435 $ 17 $ 7,761 $ 1,819 $ 187 $ 25,829 Totals $ 578,922 $ 275,977 $ 275,069 $ 180,349 $ 138,246 $ 428,702 $ 211,291 $ 2,088,556 The following table shows the amortized cost of loans by class, payment aging and non-accrual status as of March 31, 2021 and December 31, 2020. Loan Aging Analysis by Class (in thousands) Commercial and industrial Commercial real estate, owner-occupied Commercial real estate, investor-owned Construction Home equity Other residential Installment and other consumer Total March 31, 2021 30-59 days past due $ — $ — $ 791 $ — $ 120 $ — $ 136 $ 1,047 60-89 days past due — — — — 96 — — 96 90 days or more past due — — 878 — — — — 878 Total past due — — 1,669 — 216 — 136 2,021 Current 545,069 308,266 953,352 71,066 96,359 124,383 21,256 2,119,751 Total loans 1 $ 545,069 $ 308,266 $ 955,021 $ 71,066 $ 96,575 $ 124,383 $ 21,392 $ 2,121,772 Non-accrual loans 2 $ — $ 7,147 $ 1,603 $ — $ 455 $ — $ — $ 9,205 Non-accrual loans with no allowance $ — $ 7,147 $ 1,603 $ — $ 455 $ — $ — $ 9,205 December 31, 2020 30-59 days past due $ — $ — $ 1,673 $ — $ 274 $ — $ 136 $ 2,083 60-89 days past due — — — — — — 622 622 90 days or more past due — — — — — — — — Total past due — — 1,673 — 274 — 758 2,705 Current 498,408 304,963 959,535 73,046 104,539 123,395 21,965 2,085,851 Total loans 1 $ 498,408 $ 304,963 $ 961,208 $ 73,046 $ 104,813 $ 123,395 $ 22,723 $ 2,088,556 Non-accrual loans 2 $ — $ 7,147 $ 1,610 $ — $ 459 $ — $ 17 $ 9,233 Non-accrual loans with no allowance $ — $ 7,147 $ 1,610 $ — $ 459 $ — $ 17 $ 9,233 1 There were no loans past due more than ninety days accruing interest at March 31, 2021 or December 31, 2020. 2 None of the non-accrual loans as of March 31, 2021 or December 31, 2020 were earning interest on a cash basis. We recognized no interest income on non-accrual loans for the three months ended March 31, 2021 and 2020. There were no new loans placed on non accrual status during the three months ended March 31, 2021. Accrued interest of $13 thousand was reversed from interest income for loans that were placed on non-accrual status during the three months ended March 31, 2020. Collateral Dependent Loans The following table presents the amortized cost basis of individually analyzed collateral-dependent non-accrual loans by class at March 31, 2021 and December 31, 2020. Amortized Cost by Collateral Type (in thousands) Commercial Real Estate Residential Real Estate Other Total Allowance for Credit Losses March 31, 2021 Commercial real estate, owner-occupied $ 7,147 $ — $ — $ 7,147 $ — Commercial real estate, investor-owned 1,603 — — 1,603 — Home equity — 454 — 454 — Total $ 8,750 $ 454 $ — $ 9,204 $ — December 31, 2020 Commercial real estate, owner-occupied $ 7,147 $ — $ — $ 7,147 $ — Commercial real estate, investor-owned 1,610 — — 1,610 — Home equity — 459 — 459 — Installment and other consumer — — 17 17 — Total $ 8,757 $ 459 $ 17 $ 9,233 $ — No collateral-dependent loans were in process of foreclosure at March 31, 2021 or December 31, 2020. In addition, the weighted average loan-to-value of collateral dependent loans was approximately 59.2% at both March 31, 2021 and December 31, 2020. Troubled Debt Restructuring Our loan portfolio includes certain loans modified in a troubled debt restructuring (“TDR”), where we have granted economic concessions to borrowers experiencing financial difficulties. These concessions typically result from our loss mitigation activities and could include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions. TDRs on non-accrual status at the time of restructure may be returned to accruing status after management considers the borrower’s sustained repayment performance for a reasonable period, generally nine months, and obtains reasonable assurance of repayment and performance. We may remove a loan from TDR designation if it meets all of the following conditions: • The loan is subsequently refinanced or restructured at current market interest rates and the new terms are consistent with the treatment of creditworthy borrowers under regular underwriting standards; • The borrower is no longer considered to be in financial difficulty; • Performance on the loan is reasonably assured; and • Existing loan did not have any forgiveness of principal or interest. There were no loans removed from TDR designation during the three months ended March 31, 2021 and 2020. In accordance with section 4013 of the CARES Act, subsequently amended by section 541 of the Economic Aid Act, we elected to apply the temporary accounting relief provisions for loan modifications that met certain criteria, which would otherwise be designated TDRs under existing GAAP. As of March 31, 2021, 13 borrowing relationships with 20 loans totaling $65.4 million were continuing to benefit from payment relief. Subsequent to quarter end and prior to the filing of this report, two relationships with three loans totaling $6.2 million transitioned out of the payment relief program and began making normal contractual payments. The weighted average loan-to-value ratio of the remaining payment relief loans was 40%. We accrue and recognize interest income on loans under payment relief based on the original contractual interest rates. When payments resume at the end of the relief period, the payments will generally be applied to accrued interest due until accrued interest is fully paid. The following table summarizes the carrying amount of TDR loans by loan class as of March 31, 2021 and December 31, 2020. (in thousands) Recorded Investment in Troubled Debt Restructurings 1 March 31, 2021 December 31, 2020 Commercial and industrial $ 854 $ 1,021 Commercial real estate, owner-occupied 7,147 7,147 Commercial real estate, investor-owned 1,741 3,305 Home equity 277 281 Installment and other consumer 756 752 Total $ 10,775 $ 12,506 1 TDR loans on non-accrual status totaled $7.4 million at both March 31, 2021 and December 31, 2020. Unfunded commitments for TDR loans totaled $845 thousand a s of March 31, 2021 The following table presents information for loans modified in a TDR during the presented periods, including the number of modified contracts, the recorded investment in the loans prior to modification, and the recorded investment in the loans at period end after being restructured. The table excludes fully charged-off TDR loans and loans modified in a TDR and subsequently paid-off during the years presented, if applicable. (dollars in thousands) Number of Contracts Modified Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment at Period End TDRs during the three months ended March 31, 2021: None — $ — $ — $ — TDRs during the three months ended March 31, 2020: Commercial and industrial 1 $ 170 $ 162 $ 144 Installment and other consumer 2 103 103 103 Total 3 $ 273 $ 265 $ 247 The loans modified in 2020 reflected debt consolidation, interest rate concessions, and/or other loan term and payment modifications. During the three months ended March 31, 2021 and 2020, there were no defaults on loans that had been modified in a TDR within the prior twelve-month period. We report defaulted TDRs based on a payment default definition of more than ninety days past due. The following table discloses activity in the allowance for credit losses for the periods presented. Allowance for Credit Losses Rollforward (in thousands) Commercial and industrial Commercial real estate, owner-occupied Commercial real estate, investor-owned Construction Home equity Other residential Installment and other consumer Unallocated Total Three months ended March 31, 2021 Beginning balance $ 2,530 $ 2,778 $ 12,682 $ 1,557 $ 738 $ 998 $ 291 $ 1,300 $ 22,874 Provision (reversal) - CECL (880) (474) (1,826) (254) (218) (241) (36) 1,000 (2,929) Charge-offs — — — — — — — — — Recoveries 4 — — 9 — — — — 13 Ending balance $ 1,654 $ 2,304 $ 10,856 $ 1,312 $ 520 $ 757 $ 255 $ 2,300 $ 19,958 Three months ended March 31, 2020 Beginning balance $ 2,334 $ 2,462 $ 8,483 $ 638 $ 850 $ 973 $ 284 $ 653 $ 16,677 Provision - incurred loss 446 335 742 86 132 125 79 255 2,200 Charge-offs — — — — — — — — — Recoveries 4 — — 3 — — — — 7 Ending balance $ 2,784 $ 2,797 $ 9,225 $ 727 $ 982 $ 1,098 $ 363 $ 908 $ 18,884 We adopted the CECL accounting standard on December 31, 2020, which we had previously postponed under the optional accounting relief provisions of the CARES Act passed in March 2020 to the earlier of the end of the national emergency or December 31, 2020. During the first three months of 2020, we applied the incurred loss method under previous GAAP in determining the allowance for credit losses on loans. Pledged Loans Our FHLB line of credit is secured under terms of a blanket collateral agreement by a pledge of certain qualifying loans with unpaid principal balances of $1.103 billion and $1.165 billion at March 31, 2021 and December 31, 2020, respectively. In addition, we pledge eligible TIC loans, which totaled $112.4 million and $113.6 million at March 31, 2021 and December 31, 2020, respectively, to secure our borrowing capacity with the Federal Reserve Bank ("FRB"). Also, see Note 6, Borrowings. Related Party Loans The Bank has, and expects to have in the future, banking transactions in the ordinary course of its business with directors, officers, principal shareholders and their businesses or associates. These loans are granted on substantially the same terms, including interest rates and collateral on loans, as those prevailing at the same time for comparable transactions with persons not related to us. Likewise, these transactions do not involve more than the normal risk of collectability or present other unfavorable features. Related party loans totaled $5.9 million at March 31, 2021 and $6.4 million at December 31, 2020. In addition, undisbursed commitments to related parties totaled $9.1 million at March 31, 2021 and December 31, 2020.

Borrowings and Other Obligation

Borrowings and Other Obligations	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Borrowings and Other Obligations	Borrowings and Other Obligations Federal Funds Purchased – The Bank had unsecured lines of credit with correspondent banks for overnight borrowings totaling $135.0 million at March 31, 2021 and December 31, 2020. In general, interest rates on these lines approximate the federal funds target rate. We had no overnight borrowings under these credit facilities at March 31, 2021 or December 31, 2020 . Federal Home Loan Bank Borrowings – As of March 31, 2021 and December 31, 2020, the Bank had lines of credit with the FHLB totaling $634.2 million and $642.5 million, respectively, based on eligible collateral of certain loans. There were no FHLB overnight borrowings at March 31, 2021 or December 31, 2020. Federal Reserve Line of Credit – The Bank has a line of credit with the FRBSF secured by certain residential loans. At March 31, 2021 and December 31, 2020, the Bank had borrowing capacity under this line totaling $77.5 million and $78.7 million, respectively, and had no outstanding borrowings with the FRBSF. Subordinated Debenture – As part of an acquisition in 2013, Bancorp assumed a subordinated debenture with a contractual balance of $4.1 million due to NorCal Community Bancorp Trust II (the "Trust"), established for the sole purpose of issuing trust preferred securities. On March 15, 2021, Bancorp redeemed in full the $2.8 million (book value) subordinated debenture due to the Trust, which had an effective interest rate of 5.7% in 2020. The higher effective rate in the first quarter of 2021 included accelerated accretion of the $1.3 million remaining purchase discount due to the early redemption. Accretion was $17 thousand for the three months ended March 31, 2020. Other Obligations – The Bank leases certain equipment under finance leases, which are included in borrowings and other obligations in the consolidated statements of condition. See Note 8, Commitments and Contingencies, for additional information.

Stockholders' Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Stockholders' Equity	Stockholders' Equity Dividends On April 16, 2021, Bancorp declared a $0.23 per share cash dividend, payable on May 7, 2021 to shareholders of record at the close of business on April 30, 2021. Share-Based Payments The fair value of stock options as of the grant date is recorded as stock-based compensation expense in the consolidated statements of comprehensive income over the requisite service period, which is generally the vesting period, with a corresponding increase in common stock. Stock-based compensation also includes compensation expense related to the issuance of restricted stock awards. The grant-date fair value of the restricted stock awards, which equals the grant date price, is recorded as compensation expense over the requisite service period with a corresponding increase in common stock as the shares vest. Beginning in 2018, stock option and restricted stock awards issued include a retirement eligibility clause whereby the requisite service period is satisfied at the retirement eligibility date. For those awards, we accelerate the recording of stock-based compensation when the award holder is eligible to retire. However, retirement eligibility does not affect the vesting of restricted stock or the exercisability of the stock options, which are based on the scheduled vesting period. Performance-based stock awards (restricted stock) are issued to a selected group of employees. Stock award vesting is contingent upon the achievement of pre-established long-term performance goals set by the Compensation Committee of the Board of Directors. Performance is measured over a three-year period and cliff vested. These performance-based stock awards were granted at a maximum opportunity level, and based on the achievement of the pre-established goals, the actual payouts can range from 0% to 200% of the target award. For performance-based stock awards, an estimate is made of the number of shares expected to vest based on the probability that the performance criteria will be achieved to determine the amount of compensation expense to be recognized. The estimate is re-evaluated quarterly and total compensation expense is adjusted for any change in the current period. We record excess tax benefits (deficiencies) resulting from the exercise of non-qualified stock options, the disqualifying disposition of incentive stock options and vesting of restricted stock awards as income tax benefits (expense) in the consolidated statements of comprehensive income with a corresponding decrease (increase) to current taxes payable. The holders of unvested restricted stock awards are entitled to dividends on the same per-share ratio as holders of common stock. Tax benefits for dividends paid on unvested restricted stock awards are recorded as tax benefits in the consolidated statements of comprehensive income with a corresponding decrease to current taxes payable. Dividends on forfeited awards are included in stock-based compensation expense. Stock options and restricted stock may be net settled in a cashless exercise by a reduction in the number of shares otherwise deliverable upon exercise or vesting in satisfaction of the exercise payment and/or applicable tax withholding requirements. During the three months ended March 31, 2021, we withheld 27,547 shares totaling $1.1 million at a weighted-average price of $38.87 for cashless exercises. During the three months ended March 31, 2020, we withheld 8,409 shares totaling $346 thousand at a weighted-average price of $41.17 for cashless exercises. Shares withheld under net settlement arrangements are available for future grants. Share Repurchase Program On April 23, 2018, Bancorp announced that its Board of Directors approved a Share Repurchase Program under which Bancorp may repurchase up to $25.0 million of its outstanding common stock through May 1, 2019. Bancorp's Board of Directors subsequently extended the Share Repurchase Program through February 28, 2020. After expiration of this Share Repurchase Program, our new Share Repurchase Program began on March 1, 2020. The new program was approved on January 24, 2020 by Bancorp Board of Directors, allowing Bancorp to repurchase up to $25.0 million of its outstanding common stock through February 28, 2022. The new share repurchase program, which began on March 1, 2020, was suspended by the Board of Directors on March 20, 2020 in response to the COVID-19 pandemic. The program was reactivated by the Board of Directors on October 23, 2020. Under the Share Repurchase Program, Bancorp may purchase shares of its common stock through various means such as open market transactions, including block purchases, and privately negotiated transactions. The number of shares repurchased and the timing, manner, price and amount of any repurchases will be determined at Bancorp's discretion. Factors include, but are not limited to, stock price, trading volume and general market conditions, along with Bancorp’s general business conditions. The program may be suspended or discontinued at any time and does not obligate Bancorp to acquire any specific number of shares of its common stock. As part of the Share Repurchase Program, Bancorp entered into a trading plan adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended. The 10b5-1 trading plan permits common stock to be repurchased at times that might otherwise be prohibited under insider trading laws or self-imposed trading restrictions. The 10b5-1 trading plan is administered by an independent broker and is subject to price, market volume and timing restrictions. During the three months ended March 31, 2021, Bancorp repurchased 224,013 shares totaling $8.5 million for a cumulative 393,594 shares amounting to $14.3 million under the $25.0 million share repurchase program that was approved by the Board of Directors on January 24, 2020.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Financial Instruments with Off-Balance Sheet Risk We make commitments to extend credit in the normal course of business to meet the financing needs of our customers. These financial instruments include commitments to extend credit in the form of loans or through standby letters of credit. 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. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Because various commitments will expire without being fully drawn, the total commitment amount does not necessarily represent future cash requirements. Our credit loss exposure is equal to the contractual amount of the commitment in the event of nonperformance by the borrower. We use the same credit underwriting criteria for all credit exposure. The amount of collateral obtained, if deemed necessary by us, is based on management's credit evaluation of the borrower. Collateral types pledged may include accounts receivable, inventory, other personal property and real property. The contractual amount of unfunded loan commitments and standby letters of credit not reflected in the consolidated statements of condition are as follows: (in thousands) March 31, 2021 December 31, 2020 Commercial lines of credit $ 309,469 $ 287,533 Revolving home equity lines 199,332 189,035 Undisbursed construction loans 89,605 41,033 Personal and other lines of credit 10,431 9,567 Standby letters of credit 1,917 1,964 Total commitments and standby letters of credit $ 610,754 $ 529,132 We record an allowance for credit losses on unfunded loan commitments at the balance sheet date based on estimates of the probability that these commitments will be drawn upon according to historical utilization experience of the different types of commitments and expected loss rates determined for pooled funded loans. The allowance for credit losses on unfunded commitments totaled $2.2 million and $2.8 million as of March 31, 2021 and December 31, 2020, respectively, which is recorded in interest payable and other liabilities in the consolidated statements of condition. We adopted the CECL accounting standard on December 31, 2020. We applied the incurred loss method under previous GAAP in determining the allowance for credit losses on unfunded commitments for the three month period ended March 31, 2020. We recorded a $590 thousand reversal of the allowance for credit losses on unfunded commitments for the three months ended March 31, 2021, compared to a $102 thousand provision for credit losses on unfunded commitments for the three month period ended March 31, 2020. Leases We lease premises under long-term non-cancelable operating leases with remaining terms of 1 year to 12 years, most of which include escalation clauses and one or more options to extend the lease term, and some of which contain lease termination clauses. Lease terms may include certain renewal options that were considered reasonably certain to be exercised. We lease certain equipment under finance leases with initial terms of 3 years to 5 years. The equipment finance leases do not contain renewal options, bargain purchase options or residual value guarantees. The following table shows the balances of operating and finance lease right-of-use assets and lease liabilities. (in thousands) March 31, 2021 December 31, 2020 Operating leases: Operating lease right-of-use assets $ 24,559 $ 25,612 Operating lease liabilities $ 25,993 $ 27,062 Finance leases: Finance lease right-of-use assets $ 62 $ 365 Accumulated amortization (31) (307) Finance lease right-of-use assets, net 1 $ 31 $ 58 Finance lease liabilities 2 $ 30 $ 58 1 Included in premises and equipment in the consolidated statements of condition. 2 Included in borrowings and other obligations in the consolidated statements of condition. The following table shows supplemental disclosures of noncash investing and financing activities for the period presented. Three months ended (in thousands) March 31, 2021 March 31, 2020 Right-of-use assets obtained in exchange for operating lease liabilities $ — $ 12,178 Right-of-use assets obtained in exchange for finance lease liabilities $ — $ 18 The following table shows components of operating and finance lease cost. Three months ended (in thousands) March 31, 2021 March 31, 2020 Operating lease cost $ 1,164 $ 1,055 Variable lease cost — 2 Total operating lease cost 1 $ 1,164 $ 1,057 Finance lease cost: Amortization of right-of-use assets 2 $ 27 $ 44 Interest on finance lease liabilities 3 — 1 Total finance lease cost 27 45 Total lease cost $ 1,191 $ 1,102 1 Included in occupancy and equipment expense in the consolidated statements of comprehensive income. 2 Included in depreciation and amortization in the consolidated statements of comprehensive income. 3 Included in interest on borrowings and other obligations in the consolidated statements of comprehensive income. The following table shows the future minimum lease payments, weighted average remaining lease terms, and weighted average discount rates under operating and finance lease arrangements as of March 31, 2021. The discount rates used to calculate the present value of lease liabilities were based on the collateralized FHLB borrowing rates that were commensurate with lease terms and minimum payments on the later of the date we adopted the new lease accounting standards or lease commencement date. (in thousands) March 31, 2021 Year Operating Leases Finance Leases 2021 $ 3,431 $ 13 2022 4,424 14 2023 4,004 4 2024 3,300 — 2025 2,876 — Thereafter 9,867 — Total minimum lease payments 27,902 31 Amounts representing interest (present value discount) (1,909) (1) Present value of net minimum lease payments (lease liability) $ 25,993 $ 30 Weighted average remaining term (in years) 7.6 2.0 Weighted average discount rate 1.79 % 1.93 % Litigation Matters Bancorp may be party to legal actions that arise from time to time in the normal course of business. Bancorp's management is not aware of any pending legal proceedings to which either it or the Bank may be a party or has recently been a party that will have a material adverse effect on the financial condition or results of operations of Bancorp or the Bank. The Bank is responsible for a proportionate share of certain litigation indemnifications provided to Visa U.S.A. ("Visa") by its member banks in connection with Visa's lawsuits related to anti-trust charges and interchange fees ("Covered Litigation"). Our proportionate share of the litigation indemnification liability does not change or transfer upon the sale of our Class B Visa shares to member banks. Visa established an escrow account to pay for settlements or judgments in the Covered Litigation. Under the terms of the U.S. retrospective responsibility plan, when Visa funds the litigation escrow account, it triggers a conversion rate reduction of the Class B common stock to shares of Class A common stock, effectively reducing the aggregate value of the Class B common stock held by Visa's member banks like us. In 2012, Visa had reached a $4.0 billion interchange multidistrict litigation class settlement agreement with plaintiffs representing a class of U.S. retailers. The escrow balance of $894 thousand as of March 31, 2021, combined with funds previously deposited with the court, are expected to cover the settlement payment obligations.

Derivative Financial Instrument

Derivative Financial Instruments and Hedging Activities	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments and Hedging Activities	Derivative Financial Instruments and Hedging Activities We entered into interest rate swap agreements, primarily as an asset/liability management strategy, in order to mitigate the changes in the fair value of specified long-term fixed-rate loans (or firm commitments to enter into long-term fixed-rate loans) caused by changes in interest rates. These hedges allow us to offer long-term fixed-rate loans to customers without assuming the interest rate risk of a long-term asset. Converting our fixed-rate interest payments to floating-rate interest payments, generally benchmarked to the one-month U.S. dollar LIBOR index, protects us against changes in the fair value of our loans associated with fluctuating interest rates. Our credit exposure, if any, on interest rate swap asset positions is limited to the fair value (net of any collateral pledged to us) and interest payments of all swaps by each counterparty. Conversely, when an interest rate swap is in a liability position exceeding a certain threshold, we may be required to post collateral to the counterparty in an amount determined by the agreements. Collateral levels are monitored and adjusted on a regular basis for changes in interest rate swap values. As of March 31, 2021, we had four interest rate swap agreements, which are scheduled to mature in June 2031, October 2031, July 2032, and October 2037. All of our derivatives are accounted for as fair value hedges. The notional amounts of the interest rate contracts are equal to the notional amounts of the hedged loans. Our interest rate swap payments are settled monthly with counterparties. Accrued interest on the swaps totaled $11 thousand at both March 31, 2021 and December 31, 2020. Information on our derivatives follows: Asset Derivatives Liability Derivatives (in thousands) March 31, December 31, 2020 March 31, December 31, 2020 Fair value hedges: Interest rate contracts notional amount $ — $ — $ 13,754 $ 13,991 Interest rate contracts fair value 1 $ — $ — $ 1,193 $ 1,912 1 See Note 3, Fair Value of Assets and Liabilities, for valuation methodology. The following table presents the carrying amount and associated cumulative basis adjustment related to the application of fair value hedge accounting that is included in the carrying amount of hedged assets as of March 31, 2021 and December 31, 2020. Carrying Amounts of Hedged Assets Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Loans (in thousands) March 31, 2021 December 31, 2020 March 31, 2021 December 31, 2020 Loans $ 14,793 $ 15,745 $ 1,039 $ 1,753 The following table presents the net losses recognized in interest income on loans on the consolidated statements of comprehensive income related to our derivatives designated as fair value hedges. Three months ended (in thousands) March 31, 2021 March 31, 2020 Interest and fees on loans 1 $ 20,661 $ 20,887 Increase (decrease) in fair value of designated interest rate swaps due to LIBOR interest rate movements $ 719 $ (1,440) Payment on interest rate swaps (93) (67) (Decrease) increase in value of hedged loans (714) 1,470 Decrease in value of yield maintenance agreement (3) (3) Net losses on fair value hedging relationships recognized in interest income $ (91) $ (40) 1 Represents the income line item in the statement of comprehensive income in which the effects of fair value hedges are recorded. Our derivative transactions with counterparties are under International Swaps and Derivative Association (“ISDA”) master agreements that include “right of set-off” provisions. “Right of set-off” provisions are legally enforceable rights to offset recognized amounts and there may be an intention to settle such amounts on a net basis. We do not offset such financial instruments for financial reporting purposes. Information on financial instruments that are eligible for offset in the consolidated statements of condition follows: Offsetting of Financial Assets and Derivative Assets Gross Amounts Net Amounts of Gross Amounts Not Offset in Gross Amounts Offset in the Assets Presented the Statements of Condition of Recognized Statements of in the Statements Financial Cash Collateral ( in thousands) Assets Condition of Condition Instruments Received Net Amount March 31, 2021 Derivatives by Counterparty: Counterparty A $ — $ — $ — $ — $ — $ — December 31, 2020 Derivatives by Counterparty: Counterparty A $ — $ — $ — $ — $ — $ — Offsetting of Financial Liabilities and Derivative Liabilities Gross Amounts Net Amounts of Gross Amounts Not Offset in Gross Amounts Offset in the Liabilities Presented the Statements of Condition of Recognized Statements of in the Statements Financial Cash Collateral (in thousands) Liabilities 1 Condition of Condition 1 Instruments Pledged Net Amount March 31, 2021 Derivatives by Counterparty: Counterparty A $ 1,193 $ — $ 1,193 $ — $ (1,193) $ — December 31, 2020 Derivatives by Counterparty: Counterparty A $ 1,912 $ — $ 1,912 $ — $ (1,912) $ — 1 Amounts exclude accrued interest on swaps. For more information on how we account for our interest rate swaps, refer to Note 1 to the Consolidated Financial Statements included in our 2020 Form 10-K filed with the SEC on March 13, 2021.

Merger Agreement

Merger Agreement	3 Months Ended
	Mar. 31, 2021
Subsequent Events [Abstract]
Merger Agreement	Merger AgreementOn April 16, 2021, Bancorp entered into a definitive agreement to acquire American River Bankshares ("AMRB"), parent company of American River Bank ("ARB"), whereby AMRB will merge with and into Bancorp and immediately thereafter ARB will merge with and into Bank of Marin (collectively, the "Merger"). The acquisition will expand Bank of Marin's presence throughout the Greater Sacramento, Amador and Sonoma County Regions where ARB has ten branches. Under the terms of the merger agreement, AMRB shareholders will receive a fixed exchange ratio of 0.575 shares of Bancorp's common stock for each share of AMRB's common stock outstanding upon consummation of the Merger. AMRB had total assets of $916.1 million, total deposits of $788.6 million, and total loans of $475.4 million as of March 31, 2021. These amounts are subject to fair value adjustments upon the close of the Merger. The Merger is expected to be completed in the third quarter of 2021, subject to approval by shareholders of Bancorp and AMRB, receipt of required regulatory and other approvals and satisfaction of customary closing conditions.

Basis of Presentation - (Polici

Basis of Presentation - (Policies)	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The consolidated financial statements include the accounts of Bank of Marin Bancorp (“Bancorp”), a bank holding company, and its wholly-owned bank subsidiary, Bank of Marin (the “Bank”), a California state-chartered commercial bank. References to “we,” “our,” “us” mean Bancorp and the Bank that are consolidated for financial reporting purposes. The accompanying unaudited consolidated interim financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Certain information and note disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles ("GAAP") have been condensed or omitted pursuant to those rules and regulations. Certain items in prior financial statements have been reclassified to conform to the current presentation. Although we believe that the disclosures are adequate and the information presented is not misleading, we suggest that these interim financial statements be read in conjunction with the annual financial statements and the notes thereto included in our 2020 Annual Report on Form 10-K. In the opinion of management, the unaudited consolidated financial statements reflect all adjustments, which are necessary for a fair presentation of the consolidated financial position, the results of operations, changes in comprehensive income, changes in stockholders’ equity, and cash flows for the periods presented. All material intercompany transactions have been eliminated. The results of these interim periods may not be indicative of the results for the full year or for any other period. The NorCal Community Bancorp Trust II (the "Trust") was formed for the sole purpose of issuing trust preferred securities. Bancorp is not considered the primary beneficiary of the Trust (a variable interest entity), therefore the Trust is not consolidated in our consolidated financial statements, but rather the subordinated debenture is shown as a liability on our consolidated statements of condition. Bancorp's investment in the securities of the Trust is accounted for under the equity method and is included in interest receivable and other assets on the consolidated statements of condition. Refer to Note 6, Borrowings, for additional information on the subordinated debenture due to NorCal Community Bancorp Trust II and the early redemption that occurred on March 15, 2021.
Earnings Per Share	Basic earnings per share (“EPS”) are calculated by dividing net income by the weighted average number of common shares outstanding during each period, excluding unvested restricted stock awards. Diluted EPS are calculated using the weighted average number of potentially dilutive common shares. The number of potentially dilutive common shares included in the quarterly diluted EPS is computed using the average market prices during the three months included in the reporting period under the treasury stock method. The number of potentially dilutive common shares included in year-to-date diluted EPS is a year-to-date weighted average of potentially dilutive common shares included in each quarterly diluted EPS computation. In computing diluted EPS, we exclude anti-dilutive shares such as options whose exercise prices exceed the current common stock price, as they would not reduce EPS under the treasury method. We have two forms of outstanding common stock: common stock and unvested restricted stock awards. Holders of unvested restricted stock awards receive non-forfeitable dividends at the same rate as common shareholders and they both share equally in undistributed earnings. Under the two-class method, the difference in EPS is nominal for these participating securities.
Recently Adopted and Issued Accounting Standards	Accounting Standards Adopted in 2021 In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (ASC Topic 740): Simplifying the Accounting for Income Taxes . This ASU is intended to reduce the cost and complexity related to accounting for income taxes by removing certain exceptions to the guidance in ASC 740 related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and simplifying aspects of the accounting for franchise taxes and enacted changes in tax laws or rates. We adopted this ASU prospectively on January 1, 2021, which did not have a material impact on our financial condition or results of operations. In January 2020, the FASB issued ASU No. 2020-01, Investments - Equity Securities (ASC Topic 321), Investments - Equity Method and Joint Ventures (ASC Topic 323), and Derivatives and Hedging (ASC Topic 815) - Clarifying the Interactions between ASC 321, ASC 323, and ASC 815 . Among other things, this ASU clarifies that a company should consider observable transactions that require a company to either apply or discontinue the equity method of accounting under ASC 323, for the purposes of applying the measurement alternative in accordance with ASC 321. We adopted this ASU prospectively on January 1, 2021, which did not have a material impact on our financial condition or results of operations. In October 2020, the FASB issued ASU No. 2020-08, Codification Improvements to Subtopic 310-20, Receivables—Nonrefundable Fees and Other Costs . This ASU was issued as part of the Board's ongoing project to improve codification or correct unintended application. This ASU adds clarification to ASU 2017-08, which the Bank early-adopted in 2017, and delineates whether an entity with callable debt securities that have multiple call dates should amortize the amount above that which is repayable, to the next call date. We adopted this ASU prospectively on January 1, 2021. Because this ASU was narrow in scope and for clarification purposes, it did not have a material impact on our financial condition and results of operations. Accounting Standards Not Yet Effective In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848) . The amendments in this ASU are elective and provide optional guidance for a limited period of time to ease the potential burden of accounting for, or recognizing the effects of reference rate reform. The amendments in this ASU provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The amendments in this ASU may be elected as of March 12, 2020 through December 31, 2022. An entity may choose to elect the amendments in this update at an interim period subsequent to March 12, 2020 with adoption methods varying based on transaction type. We have not elected to apply amendments at this time, however, will assess the applicability of this ASU to us as we continue to monitor guidance for reference rate reform from FASB and its impact on our financial condition and results of operations. In January 2021, the FASB issued ASU No. 2021-01, Reference Rate Reform (Topic 848). The main amendments in this ASU are intended to clarify certain optional expedients and scope of derivative instruments. The amendments are elective and effective immediately upon issuance of this ASU. Amendments may be elected through December 31, 2022. We have not elected to apply amendments at this time, however, will assess the applicability of this ASU to us as we continue to monitor guidance for reference rate reform from FASB and its impact on our financial condition and results of operations.
Fair Value Hierarchy and Fair Value Measurement	We group our assets and liabilities that are measured at fair value in three levels within the fair value hierarchy, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are: Level 1: Valuations are based on unadjusted quoted prices in active markets for identical assets or liabilities. Level 2: Valuations are based on quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuations for which all significant assumptions are observable or can be corroborated by observable market data. Level 3: Valuations are based on unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Values are determined using pricing models and discounted cash flow models and may include significant management judgment and estimation. Fair value of loans is based on exit price techniques and obtained from an independent third-party that uses its proprietary valuation model and methodology and may not reflect actual or prospective market valuations. The discounted cash flow valuation approach reflects key inputs and assumptions such as loan probability of default, loss given default, prepayment speed, and market discount rates. Fair value of fixed-rate time deposits is estimated by discounting future contractual cash flows using discount rates that reflect the current market rates offered for time deposits of similar remaining maturities. Fair value of the subordinated debenture is estimated using a discounted cash flow approach based on current interest rates for similar financial instruments adjusted for credit and liquidity spreads.
Finance, Loan and Lease Receivables, Held-for-investment, Allowance and Nonperforming Loans	Commercial and Industrial Loans - Commercial loans are generally made to established small and mid-sized businesses to provide financing for their growth and working capital needs, equipment purchases and acquisitions. Management examines historical, current, and projected cash flows to determine the ability of the borrower to repay obligations as agreed. Commercial loans are made based primarily on the identified cash flows of the borrower and secondarily on the underlying collateral and guarantor support. The cash flows of borrowers, however, may not occur as expected, and the collateral securing these loans may fluctuate in value. Most commercial and industrial loans are secured by the assets being financed, such as accounts receivable and inventory, and typically include personal guarantees. We target stable businesses with guarantors who provide additional sources of repayment and have proven to be resilient in periods of economic stress. A weakened economy, and resultant decreased consumer and/or business spending, may have an effect on the credit quality of commercial loans. In April 2020, the Bank began participating in the Small Business Administration's ("SBA") Paycheck Protection Program ("PPP"). As of March 31, 2021, there were 2,513 PPP loans outstanding. PPP loans totaling $365.0 million (net of $8.0 million in unrecognized fees and costs) and $291.6 million (net of $5.4 million in unrecognized fees and costs) as of March 31, 2021 and December 31, 2020, respectively, were included in commercial and industrial loan balances. Of the PPP loans outstanding as of March 31, 2021, 841 loans totaling $119.5 million funded during the first quarter of 2021 under the second round of the PPP stimulus plan. PPP loans have terms of two to five years and earn interest at 1%. In addition, the SBA paid the Bank a fee of 1%-5% depending on the loan amount, which was netted with loan origination costs and accreted/amortized into interest income using the effective yield method over the contractual life of each loan. The recognition of fees and costs is accelerated when the SBA forgives the loan and/or the loan is paid off prior to maturity. PPP loans are fully guaranteed by the SBA and have virtually no risk of loss. We expect the vast majority of the PPP loans to be fully forgiven by the SBA. Commercial Real Estate Loans - Commercial real estate loans, which include income producing investment properties and owner-occupied real estate used for business purposes, are subject to underwriting standards and processes similar to commercial loans discussed above. We underwrite these loans to be repaid from cash flow and to be supported by real property collateral. Underwriting standards for commercial real estate loans include, but are not limited to, debt coverage and loan-to-value ratios. Furthermore, a large majority of our loans are guaranteed by the owners of the properties. Conditions in the real estate markets or downturn in the general economy may adversely affect our commercial real estate loans. In the event of a vacancy, we expect guarantors to carry the loans until they find a replacement tenant. The owner's substantial equity investment provides a strong economic incentive to continue to support the commercial real estate projects. As such, we have generally experienced a relatively low level of loss and delinquencies in this portfolio. Construction Loans - Construction loans are generally made to developers and builders to finance construction, renovation and occasionally land acquisitions in anticipation of near-term development. Construction loans include interest reserves that are used for the payment of interest during the development and marketing periods and are capitalized as part of the loan balance. When a construction loan is placed on nonaccrual status before the depletion of the interest reserve, we apply the interest funded by the interest reserve against the loan's principal balance. These loans are underwritten after evaluation of the borrower's financial strength, reputation, prior track record, and independent appraisals. We monitor all construction projects to determine whether they are on schedule, completed as planned and in accordance with the approved construction budgets. Significant events can affect the construction industry, including: the inherent volatility of real estate markets and vulnerability to delays due to weather, change orders, inability to obtain construction permits, labor or material shortages, and price changes. Estimates of construction costs and value associated with the completed project may be inaccurate. Repayment of construction loans is largely dependent on the ultimate success of the project. Consumer Loans - Consumer loans primarily consist of home equity lines of credit, other residential loans and floating homes along with a small number of installment loans. Our other residential loans include tenancy-in-common fractional interest loans ("TIC") located almost entirely in San Francisco County. We originate consumer loans utilizing credit score information, debt-to-income ratio and loan-to-value ratio analysis. Diversification among consumer loan types, coupled with relatively small loan amounts that are spread across many individual borrowers, mitigates risk. We do not originate sub-prime residential mortgage loans, nor is it our practice to underwrite loans commonly referred to as "Alt-A mortgages," the characteristics of which are reduced documentation, borrowers with low FICO scores or collateral with high loan-to-value ratios. Credit Quality Indicators We use a risk rating system to evaluate asset quality, and to identify and monitor credit risk in individual loans, and in the loan portfolio. Our definitions of “Special Mention” risk graded loans, or worse, are consistent with those used by the Federal Deposit Insurance Corporation ("FDIC"). Our internally assigned grades are as follows: Pass and Watch - Loans to borrowers of acceptable or better credit quality. Borrowers in this category demonstrate fundamentally sound financial positions, repayment capacity, credit history and management expertise. Loans in this category must have an identifiable and stable source of repayment and meet the Bank’s policy regarding debt-service-coverage ratios. These borrowers are capable of sustaining normal economic, market or operational setbacks without significant financial consequences. Negative external industry factors are generally not present. The loan may be secured, unsecured or supported by non-real estate collateral for which the value is more difficult to determine and/or marketability is more uncertain. This category also includes “Watch” loans, where the primary source of repayment has been delayed. “Watch” is intended to be a transitional grade, with either an upgrade or downgrade within a reasonable period. Special Mention - Potential weaknesses that deserve close attention. If left uncorrected, those potential weaknesses may result in deterioration of the payment prospects for the asset. Special Mention assets do not present sufficient risk to warrant adverse classification. Substandard - Inadequately protected by either the current sound worth and paying capacity of the obligor or the collateral pledged, if any. A Substandard asset has a well-defined weakness or weaknesses that jeopardize(s) the liquidation of the debt. Substandard assets are characterized by the distinct possibility that we will sustain some loss if such weaknesses or deficiencies are not corrected. Well-defined weaknesses include adverse trends or developments of the borrower’s financial condition, managerial weaknesses and/or significant collateral deficiencies. Doubtful - Critical weaknesses that make collection or liquidation in full improbable. There may be specific pending events that work to strengthen the asset; however, the amount or timing of the loss may not be determinable. Pending events generally occur within one year of the asset being classified as Doubtful. Examples include: merger, acquisition, or liquidation; capital injection; guarantee; perfecting liens on additional collateral; and refinancing. Such loans are placed on non-accrual status and usually are collateral-dependent. We regularly review our credits for accuracy of risk grades whenever we receive new information. Borrowers are generally required to submit financial information at regular intervals. Typically, commercial borrowers with lines of credit are required to submit financial information with reporting intervals ranging from monthly to annually depending on credit size, risk and complexity. In addition, investor commercial real estate borrowers with loans exceeding a certain dollar threshold are usually required to submit rent rolls or property income statements annually. We monitor construction loans monthly. We review home equity and other consumer loans based on delinquency. We also review loans graded “Watch” or worse, regardless of loan type, no less than quarterly.
Troubled Debt Restructuring	Our loan portfolio includes certain loans modified in a troubled debt restructuring (“TDR”), where we have granted economic concessions to borrowers experiencing financial difficulties. These concessions typically result from our loss mitigation activities and could include reductions in the interest rate, payment extensions, forgiveness of principal, forbearance or other actions. TDRs on non-accrual status at the time of restructure may be returned to accruing status after management considers the borrower’s sustained repayment performance for a reasonable period, generally nine months, and obtains reasonable assurance of repayment and performance. We may remove a loan from TDR designation if it meets all of the following conditions: • The loan is subsequently refinanced or restructured at current market interest rates and the new terms are consistent with the treatment of creditworthy borrowers under regular underwriting standards; • The borrower is no longer considered to be in financial difficulty; • Performance on the loan is reasonably assured; and • Existing loan did not have any forgiveness of principal or interest.

Basis of Presentation - (Tables

Basis of Presentation - (Tables)	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Earnings Per Share Reconciliation	The following table shows: 1) weighted average basic shares, 2) potentially dilutive weighted average common shares related to stock options and unvested restricted stock awards, and 3) weighted average diluted shares. Basic earnings per share (“EPS”) are calculated by dividing net income by the weighted average number of common shares outstanding during each period, excluding unvested restricted stock awards. Diluted EPS are calculated using the weighted average number of potentially dilutive common shares. The number of potentially dilutive common shares included in the quarterly diluted EPS is computed using the average market prices during the three months included in the reporting period under the treasury stock method. The number of potentially dilutive common shares included in year-to-date diluted EPS is a year-to-date weighted average of potentially dilutive common shares included in each quarterly diluted EPS computation. In computing diluted EPS, we exclude anti-dilutive shares such as options whose exercise prices exceed the current common stock price, as they would not reduce EPS under the treasury method. We have two forms of outstanding common stock: common stock and unvested restricted stock awards. Holders of unvested restricted stock awards receive non-forfeitable dividends at the same rate as common shareholders and they both share equally in undistributed earnings. Under the two-class method, the difference in EPS is nominal for these participating securities. Three months ended (in thousands, except per share data) March 31, 2021 March 31, 2020 Weighted average basic common shares outstanding 13,363 13,525 Potentially dilutive common shares related to: Stock options 81 106 Unvested restricted stock awards 25 25 Weighted average diluted shares outstanding 13,469 13,656 Net income $ 8,947 $ 7,228 Basic EPS $ 0.67 $ 0.53 Diluted EPS $ 0.66 $ 0.53 Weighted average anti-dilutive common shares not included in the calculation of diluted EPS 80 70

Fair Value of Assets and Liab_2

Fair Value of Assets and Liabilities - (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following table summarizes our assets and liabilities that were required to be recorded at fair value on a recurring basis. (in thousands) Description of Financial Instruments Carrying Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs Significant Unobservable Inputs Measurement Categories: Changes in Fair Value Recorded In 1 March 31, 2021 Securities available-for-sale: Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies $ 287,323 $ — $ 287,323 $ — OCI SBA-backed securities 29,218 — 29,218 — OCI Debentures of government sponsored agencies 74,473 — 74,473 — OCI Obligations of state and political subdivisions 121,765 — 121,765 — OCI Corporate bonds 5,789 — 5,789 — OCI Derivative financial liabilities (interest rate contracts) 1,193 — 1,193 — NI December 31, 2020 Securities available-for-sale: Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies $ 228,651 $ — $ 228,651 $ — OCI SBA-backed securities 32,862 — 36,286 — OCI Debentures of government sponsored agencies 20,186 — 20,186 — OCI Obligations of state and political subdivisions 110,652 — 110,652 — OCI Derivative financial liabilities (interest rate contracts) 1,912 — 1,912 — NI 1 Other comprehensive income ("OCI") or net income ("NI").
Schedule of Fair Value by Balance Sheet Grouping	The table below is a summary of fair value estimates for financial instruments as of March 31, 2021 and December 31, 2020, excluding financial instruments recorded at fair value on a recurring basis (summarized in the first table in this note). The carrying amounts in the following table are recorded in the consolidated statements of condition under the indicated captions. Further, we have not disclosed the fair value of financial instruments specifically excluded from disclosure requirements such as bank-owned life insurance policies ("BOLI") and non-maturity deposit liabilities. Additionally, we held shares of Federal Home Loan Bank ("FHLB") of San Francisco stock and Visa Inc. Class B common stock, both recorded at cost, as there was no impairment or changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer as of March 31, 2021 or December 31, 2020. The values are discussed in Note 4, Investment Securities. March 31, 2021 December 31, 2020 (in thousands) Carrying Amounts Fair Value Fair Value Hierarchy Carrying Amounts Fair Value Fair Value Hierarchy Financial assets (recorded at amortized cost) Cash and cash equivalents $ 142,819 $ 142,819 Level 1 $ 200,320 $ 200,320 Level 1 Investment securities held-to-maturity 151,970 156,756 Level 2 109,036 115,185 Level 2 Loans, net 2,101,814 2,114,691 Level 3 2,065,682 2,089,192 Level 3 Interest receivable 10,589 10,589 Level 2 10,922 10,922 Level 2 Financial liabilities (recorded at amortized cost) Time deposits 94,955 95,241 Level 2 97,433 97,769 Level 2 Subordinated debenture — — Level 3 2,777 3,115 Level 3 Interest payable 59 59 Level 2 97 97 Level 2

Investment Securities - (Tables

Investment Securities - (Tables)	3 Months Ended
	Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Summary of Held-to-Maturity Investments	Our investment securities portfolio consists of obligations of state and political subdivisions, U.S. Corporations, U.S. federal government agencies such as Government National Mortgage Association ("GNMA") and Small Business Administration ("SBA"), U.S. government-sponsored enterprises ("GSEs"), such as Federal National Mortgage Association ("FNMA"), Federal Home Loan Mortgage Corporation ("FHLMC"), Federal Farm Credit Banks Funding Corporation and FHLB. We also invest in residential and commercial mortgage-backed securities (“MBS”/"CMBS") and collateralized mortgage obligations (“CMOs”) issued or guaranteed by the GSEs, as reflected in the following table. A summary of the amortized cost, fair value and allowance for credit losses related to securities held-to-maturity as of March 31, 2021 and December 31, 2020 is presented below. Held-to-maturity: Amortized Cost 1 Allowance for Credit Losses Net Carrying Amount Gross Unrealized Fair Value (in thousands) Gains (Losses) March 31, 2021 Securities of U.S. government-sponsored enterprises: MBS pass-through securities issued by FHLMC and FNMA $ 78,227 $ — $ 78,227 $ 3,283 $ — $ 81,510 CMOs issued by FHLMC 30,207 — 30,207 1,105 (189) 31,123 CMOs issued by FNMA 7,305 — 7,305 347 — 7,652 SBA-backed securities 5,699 — 5,699 227 — 5,926 Debentures of government-sponsored agencies 29,950 — 29,950 — — 29,950 Obligations of state and political subdivisions 582 — 582 13 — 595 Total held-to-maturity $ 151,970 $ — $ 151,970 $ 4,975 $ (189) $ 156,756 December 31, 2020 Securities of U.S. government-sponsored enterprises: MBS pass-through securities issued by FHLMC and FNMA $ 65,579 $ — $ 65,579 $ 3,924 $ — $ 69,503 CMOs issued by FHLMC 27,201 — 27,201 1,441 — 28,642 CMOs issued by FNMA 8,042 — 8,042 363 — 8,405 SBA-backed securities 6,547 — 6,547 400 — 6,947 Obligations of state and political subdivisions 1,667 — 1,667 21 — 1,688 Total held-to-maturity $ 109,036 $ — $ 109,036 $ 6,149 $ — $ 115,185 1 Amortized cost and fair values exclude accrued interest receivable of $295 thousand and $366 thousand at March 31, 2021 and December 31, 2020, respectively, which is included in interest receivable and other assets in the consolidated statements of condition.
Schedule of Bond Ratings for Held-to-Maturity Securities	The following table summarizes the amortized cost of our portfolio of held-to-maturity securities issued by states and political subdivisions by Moody's and/or Standard & Poor's bond ratings as of March 31, 2021. (in thousands) Obligations of state and political subdivisions AA $ 377 A 205 Total $ 582
Summary of Available-for-Sale Investments	A summary of the amortized cost, fair value and allowance for credit losses related to securities available-for-sale as of March 31, 2021 and December 31, 2020 is presented below. Available-for-sale: Amortized Cost 1 Gross Unrealized Allowance for Credit Losses Fair Value (in thousands) Gains (Losses) March 31, 2021 Securities of U.S. government-sponsored enterprises: MBS pass-through securities issued by FHLMC and FNMA $ 65,871 $ 2,199 $ (56) $ — $ 68,014 CMOs issued by FHLMC 168,589 5,525 (948) — 173,166 CMOs issued by FNMA 21,663 537 (31) — 22,169 CMOs issued by GNMA 23,738 236 — — 23,974 SBA-backed securities 28,059 1,212 (53) — 29,218 Debentures of government- sponsored agencies 76,313 201 (2,041) — 74,473 Obligations of state and political subdivisions 118,118 3,842 (195) — 121,765 Corporate bonds 5,986 — (197) — 5,789 Total available-for-sale $ 508,337 $ 13,752 $ (3,521) $ — $ 518,568 December 31, 2020 Securities of U.S. government-sponsored enterprises: MBS pass-through securities issued by FHLMC and FNMA $ 50,686 $ 2,530 $ — $ — $ 53,216 CMOs issued by FHLMC 143,267 7,925 (1) — 151,191 CMOs issued by FNMA 16,450 580 — — 17,030 CMOs issued by GNMA 6,863 351 — — 7,214 SBA-backed securities 30,941 1,976 (55) — 32,862 Debentures of government- sponsored agencies 19,944 266 (24) — 20,186 Obligations of state and political subdivisions 104,887 5,765 — — 110,652 Total available-for-sale $ 373,038 $ 19,393 $ (80) $ — $ 392,351 1 Amortized cost and fair value exclude accrued interest receivable of $1.9 million at both March 31, 2021 and December 31, 2020, which is included in interest receivable and other assets in the consolidated statements of condition.
Investments Classified by Contractual Maturity Date	The amortized cost a nd fair value of investment debt securities by contractual maturity at March 31, 2021 and December 31, 2020 are shown below. Expected maturities may differ from contractual maturities if the issuers of the securities have the right to call or prepay obligations with or without call or prepayment penalties. March 31, 2021 December 31, 2020 Held-to-Maturity Available-for-Sale Held-to-Maturity Available-for-Sale (in thousands) Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Amortized Cost Fair Value Within one year $ 246 $ 248 $ 15,013 $ 15,219 $ 246 $ 250 $ 11,530 $ 11,687 After one but within five years 8,847 9,284 55,101 57,955 7,550 7,961 59,028 62,397 After five years through ten years 62,415 65,241 193,424 198,301 52,113 55,872 144,908 154,089 After ten years 80,462 81,983 244,799 247,093 49,127 51,102 157,572 164,178 Total $ 151,970 $ 156,756 $ 508,337 $ 518,568 $ 109,036 $ 115,185 $ 373,038 $ 392,351
Sale of Investment Securities and Gross Gains and Losses	Sales of investment securities and gross gains and losses are shown in the following table: Three months ended (in thousands) March 31, 2021 March 31, 2020 Available-for-sale: Sales proceeds $ — $ 27,442 Gross realized gains — 800
Schedule of Financial Instruments Owned and Pledged as Collateral	Pledged investment securities are shown in the following table: (in thousands) March 31, 2021 December 31, 2020 Pledged to the State of California: Secure public deposits in compliance with the Local Agency Security Program $ 123,085 $ 131,051 Collateral for trust deposits 735 751 Total investment securities pledged to the State of California 123,820 131,802 Collateral for Wealth Management and Trust Services checking account 614 629 Total pledged investment securities $ 124,434 $ 132,431
Schedule of Unrealized Loss on Investments	There were 29 and 10 securities in unrealized loss positions at March 31, 2021 and December 31, 2020, respectively. Those securities are summarized and classified according to the duration of the loss period in the tables below: March 31, 2021 < 12 continuous months ≥ 12 continuous months Total securities (in thousands) Fair value Unrealized loss Fair value Unrealized loss Fair value Unrealized loss Held-to-maturity: CMOs issued by FHLMC $ 4,235 $ (189) $ — $ — $ 4,235 $ (189) Total held-to-maturity 4,235 (189) — — 4,235 (189) Available-for-sale: MBS pass-through securities issued by FHLMC and FNMA 10,013 (56) — — 10,013 (56) SBA-backed securities — — 1,699 (53) 1,699 (53) CMOs issued by FNMA 7,304 (31) — — 7,304 (31) CMOs issued by FHLMC 32,658 (948) — — 32,658 (948) Debentures of government- sponsored agencies 53,289 (2,041) — — 53,289 (2,041) Obligations of state and political subdivisions 28,529 (195) — — 28,529 (195) Corporate bonds 5,789 (197) — — 5,789 (197) Total available-for-sale 137,582 (3,468) 1,699 (53) 139,281 (3,521) Total temporarily impaired securities $ 141,817 $ (3,657) $ 1,699 $ (53) $ 143,516 $ (3,710) December 31, 2020 < 12 continuous months ≥ 12 continuous months Total securities (in thousands) Fair value Unrealized loss Fair value Unrealized loss Fair value Unrealized loss Available-for-sale: SBA-backed securities $ — $ — $ 1,790 $ (55) $ 1,790 $ (55) CMOs issued by FHLMC 5,975 (1) — — 5,975 (1) Debentures of government- sponsored agencies 3,943 (24) — — 3,943 (24) Total available-for-sale 9,918 (25) 1,790 (55) 11,708 (80) Total temporarily impaired securities $ 9,918 $ (25) $ 1,790 $ (55) $ 11,708 $ (80)

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses - (Tables)	3 Months Ended
	Mar. 31, 2021
Receivables [Abstract]
Schedule of Loans by Class	The following table presents the amortized cost of loans by class as of March 31, 2021 and December 31, 2020. (in thousands) March 31, 2021 December 31, 2020 Commercial and industrial $ 545,069 $ 498,408 Real estate: Commercial owner-occupied 308,266 304,963 Commercial investor-owned 955,021 961,208 Construction 71,066 73,046 Home equity 96,575 104,813 Other residential 124,383 123,395 Installment and other consumer loans 21,392 22,723 Total loans, at amortized cost 1 2,121,772 2,088,556 Allowance for credit losses on loans (19,958) (22,874) Total loans, net $ 2,101,814 $ 2,065,682 1 Amortized cost includes net deferred loan origination fees of $(6.7) million and $(4.9) million at March 31, 2021 and December 31, 2020, respectively. Amounts are also net of unrecognized purchase discounts of $782 thousand and $815 thousand at March 31, 2021 and December 31, 2020, respectively. Amortized cost excludes accrued interest, which totaled $8.5 million and $8.8 million at March 31, 2021 and December 31, 2020, respectively, and is included in interest receivable and other assets in the consolidated statements of condition.
Financing Receivable Credit Quality Indicators	The following tables present the loan portfolio by loan class, origination year and internal risk rating as of March 31, 2021 and December 31, 2020. Generally, existing term loans that were re-underwritten are reflected in the table in the year of renewal. Lines of credit that have a conversion feature at the time of origination, such as construction to perm loans, are presented by year of origination. (in thousands) Term Loans - Amortized Cost by Origination Year Revolving Loans Amortized Cost March 31, 2021 2021 2020 2019 2018 2017 Prior Total Commercial and industrial: Pass $ 116,598 $ 264,838 $ 21,201 $ 11,692 $ 4,111 $ 36,865 $ 76,742 $ 532,047 Special Mention — — 812 598 115 8 8,954 10,487 Substandard — 1,649 390 — — — 496 2,535 Total commercial and industrial $ 116,598 $ 266,487 $ 22,403 $ 12,290 $ 4,226 $ 36,873 $ 86,192 $ 545,069 Commercial real estate, owner-occupied: Pass $ 10,035 $ 30,459 $ 27,147 $ 41,816 $ 41,962 $ 110,896 $ — $ 262,315 Special Mention — — — 2,363 17,076 12,863 — 32,302 Substandard — 7,147 297 — — 6,205 — 13,649 Total commercial real estate, owner-occupied $ 10,035 $ 37,606 $ 27,444 $ 44,179 $ 59,038 $ 129,964 $ — $ 308,266 Commercial real estate, investor-owned: Pass $ 29,585 $ 161,213 $ 146,537 $ 170,153 $ 87,813 $ 336,840 $ 110 $ 932,251 Special Mention — — 6,808 — 1,811 4,581 — 13,200 Substandard — — 2,715 4,428 — 2,427 — 9,570 Total commercial real estate, investor-owned $ 29,585 $ 161,213 $ 156,060 $ 174,581 $ 89,624 $ 343,848 $ 110 $ 955,021 Construction: Pass $ 6,533 $ 29,510 $ 26,108 $ 8,915 $ — $ — $ — $ 71,066 Special Mention — — — — — — — — Substandard — — — — — — — — Total construction $ 6,533 $ 29,510 $ 26,108 $ 8,915 $ — $ — $ — $ 71,066 Home equity: Pass $ — $ — $ — $ — $ — $ 793 $ 95,115 $ 95,908 Special Mention — — — — — — — — Substandard — — — — — 388 279 667 Total home equity $ — $ — $ — $ — $ — $ 1,181 $ 95,394 $ 96,575 Other residential: Pass $ 5,524 $ 33,498 $ 29,371 $ 23,363 $ 10,520 $ 22,107 $ — $ 124,383 Special Mention — — — — — — — — Substandard — — — — — — — — Total other residential $ 5,524 $ 33,498 $ 29,371 $ 23,363 $ 10,520 $ 22,107 $ — $ 124,383 Installment and other consumer: Pass $ 1,757 $ 2,169 $ 3,334 $ 3,076 $ 1,260 $ 8,111 $ 1,685 $ 21,392 Special Mention — — — — — — — — Substandard — — — — — — — — Total installment and other consumer $ 1,757 $ 2,169 $ 3,334 $ 3,076 $ 1,260 $ 8,111 $ 1,685 $ 21,392 (in thousands) Term Loans - Amortized Cost by Origination Year Revolving Loans Amortized Cost March 31, 2021 2021 2020 2019 2018 2017 Prior Total Total loans: Pass $ 170,032 $ 521,687 $ 253,698 $ 259,015 $ 145,666 $ 515,612 $ 173,652 $ 2,039,362 Total Special Mention $ — $ — $ 7,620 $ 2,961 $ 19,002 $ 17,452 $ 8,954 $ 55,989 Total Substandard $ — $ 8,796 $ 3,402 $ 4,428 $ — $ 9,020 $ 775 $ 26,421 Totals $ 170,032 $ 530,483 $ 264,720 $ 266,404 $ 164,668 $ 542,084 $ 183,381 $ 2,121,772 (in thousands) Term Loans - Amortized Cost by Origination Year Revolving Loans Amortized Cost December 31, 2020 2020 2019 2018 2017 2016 Prior Total Commercial and industrial: Pass $ 308,237 $ 22,589 $ 12,596 $ 4,508 $ 5,915 $ 34,282 $ 85,889 $ 474,016 Special Mention — 2,034 1,318 141 11 49 19,092 22,645 Substandard 1,747 — — — — — — 1,747 Total commercial and industrial $ 309,984 $ 24,623 $ 13,914 $ 4,649 $ 5,926 $ 34,331 $ 104,981 $ 498,408 Commercial real estate, owner-occupied: Pass $ 31,029 $ 27,581 $ 32,603 $ 43,843 $ 12,768 $ 101,014 $ — $ 248,838 Special Mention — — 11,764 17,062 7,343 6,601 — 42,770 Substandard 7,147 — — — 6,208 — — 13,355 Total commercial real estate, owner-occupied $ 38,176 $ 27,581 $ 44,367 $ 60,905 $ 26,319 $ 107,615 $ — $ 304,963 Commercial real estate, investor-owned: Pass $ 162,300 $ 144,751 $ 173,955 $ 100,842 $ 94,862 $ 253,611 $ 117 $ 930,438 Special Mention — 10,695 — 1,819 — 8,124 — 20,638 Substandard — 2,716 4,435 — 1,553 1,428 — 10,132 Total commercial real estate, investor-owned $ 162,300 $ 158,162 $ 178,390 $ 102,661 $ 96,415 $ 263,163 $ 117 $ 961,208 Construction: Pass $ 31,654 $ 30,150 $ 11,242 $ — $ — $ — $ — $ 73,046 Special Mention — — — — — — — — Substandard — — — — — — — — Total construction $ 31,654 $ 30,150 $ 11,242 $ — $ — $ — $ — $ 73,046 Home equity: Pass $ — $ — $ — $ — $ 128 $ 694 $ 102,614 $ 103,436 Special Mention — — — — — — 799 799 Substandard — — — — — 391 187 578 Total home equity $ — $ — $ — $ — $ 128 $ 1,085 $ 103,600 $ 104,813 Other residential: Pass $ 34,447 $ 31,079 $ 23,673 $ 10,574 $ 6,035 $ 17,587 $ — $ 123,395 Special Mention — — — — — — — — Substandard — — — — — — — — Total other residential $ 34,447 $ 31,079 $ 23,673 $ 10,574 $ 6,035 $ 17,587 $ — $ 123,395 Installment and other consumer: Pass $ 2,361 $ 4,382 $ 3,483 $ 1,543 $ 3,423 $ 4,921 $ 2,593 $ 22,706 Special Mention — — — — — — — — Substandard — — — 17 — — — 17 Total installment and other consumer $ 2,361 $ 4,382 $ 3,483 $ 1,560 $ 3,423 $ 4,921 $ 2,593 $ 22,723 Total loans: Pass $ 570,028 $ 260,532 $ 257,552 $ 161,310 $ 123,131 $ 412,109 $ 191,213 $ 1,975,875 Total Special Mention $ — $ 12,729 $ 13,082 $ 19,022 $ 7,354 $ 14,774 $ 19,891 $ 86,852 Total Substandard $ 8,894 $ 2,716 $ 4,435 $ 17 $ 7,761 $ 1,819 $ 187 $ 25,829 Totals $ 578,922 $ 275,977 $ 275,069 $ 180,349 $ 138,246 $ 428,702 $ 211,291 $ 2,088,556
Past Due Financing Receivables	The following table shows the amortized cost of loans by class, payment aging and non-accrual status as of March 31, 2021 and December 31, 2020. Loan Aging Analysis by Class (in thousands) Commercial and industrial Commercial real estate, owner-occupied Commercial real estate, investor-owned Construction Home equity Other residential Installment and other consumer Total March 31, 2021 30-59 days past due $ — $ — $ 791 $ — $ 120 $ — $ 136 $ 1,047 60-89 days past due — — — — 96 — — 96 90 days or more past due — — 878 — — — — 878 Total past due — — 1,669 — 216 — 136 2,021 Current 545,069 308,266 953,352 71,066 96,359 124,383 21,256 2,119,751 Total loans 1 $ 545,069 $ 308,266 $ 955,021 $ 71,066 $ 96,575 $ 124,383 $ 21,392 $ 2,121,772 Non-accrual loans 2 $ — $ 7,147 $ 1,603 $ — $ 455 $ — $ — $ 9,205 Non-accrual loans with no allowance $ — $ 7,147 $ 1,603 $ — $ 455 $ — $ — $ 9,205 December 31, 2020 30-59 days past due $ — $ — $ 1,673 $ — $ 274 $ — $ 136 $ 2,083 60-89 days past due — — — — — — 622 622 90 days or more past due — — — — — — — — Total past due — — 1,673 — 274 — 758 2,705 Current 498,408 304,963 959,535 73,046 104,539 123,395 21,965 2,085,851 Total loans 1 $ 498,408 $ 304,963 $ 961,208 $ 73,046 $ 104,813 $ 123,395 $ 22,723 $ 2,088,556 Non-accrual loans 2 $ — $ 7,147 $ 1,610 $ — $ 459 $ — $ 17 $ 9,233 Non-accrual loans with no allowance $ — $ 7,147 $ 1,610 $ — $ 459 $ — $ 17 $ 9,233 1 There were no loans past due more than ninety days accruing interest at March 31, 2021 or December 31, 2020. 2 None of the non-accrual loans as of March 31, 2021 or December 31, 2020 were earning interest on a cash basis. We recognized no interest income on non-accrual loans for the three months ended March 31, 2021 and 2020. There were no new loans placed on non accrual status during the three months ended March 31, 2021. Accrued interest of $13 thousand was reversed from interest income for loans that were placed on non-accrual status during the three months ended March 31, 2020.
Schedule of Collateral Dependent Loans	The following table presents the amortized cost basis of individually analyzed collateral-dependent non-accrual loans by class at March 31, 2021 and December 31, 2020. Amortized Cost by Collateral Type (in thousands) Commercial Real Estate Residential Real Estate Other Total Allowance for Credit Losses March 31, 2021 Commercial real estate, owner-occupied $ 7,147 $ — $ — $ 7,147 $ — Commercial real estate, investor-owned 1,603 — — 1,603 — Home equity — 454 — 454 — Total $ 8,750 $ 454 $ — $ 9,204 $ — December 31, 2020 Commercial real estate, owner-occupied $ 7,147 $ — $ — $ 7,147 $ — Commercial real estate, investor-owned 1,610 — — 1,610 — Home equity — 459 — 459 — Installment and other consumer — — 17 17 — Total $ 8,757 $ 459 $ 17 $ 9,233 $ —
Troubled Debt Restructurings on Financing Receivables	The following table summarizes the carrying amount of TDR loans by loan class as of March 31, 2021 and December 31, 2020. (in thousands) Recorded Investment in Troubled Debt Restructurings 1 March 31, 2021 December 31, 2020 Commercial and industrial $ 854 $ 1,021 Commercial real estate, owner-occupied 7,147 7,147 Commercial real estate, investor-owned 1,741 3,305 Home equity 277 281 Installment and other consumer 756 752 Total $ 10,775 $ 12,506 1 TDR loans on non-accrual status totaled $7.4 million at both March 31, 2021 and December 31, 2020. Unfunded commitments for TDR loans totaled $845 thousand a s of March 31, 2021 The following table presents information for loans modified in a TDR during the presented periods, including the number of modified contracts, the recorded investment in the loans prior to modification, and the recorded investment in the loans at period end after being restructured. The table excludes fully charged-off TDR loans and loans modified in a TDR and subsequently paid-off during the years presented, if applicable. (dollars in thousands) Number of Contracts Modified Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment at Period End TDRs during the three months ended March 31, 2021: None — $ — $ — $ — TDRs during the three months ended March 31, 2020: Commercial and industrial 1 $ 170 $ 162 $ 144 Installment and other consumer 2 103 103 103 Total 3 $ 273 $ 265 $ 247
Allowance for Credit Losses on Financing Receivables	The following table discloses activity in the allowance for credit losses for the periods presented. Allowance for Credit Losses Rollforward (in thousands) Commercial and industrial Commercial real estate, owner-occupied Commercial real estate, investor-owned Construction Home equity Other residential Installment and other consumer Unallocated Total Three months ended March 31, 2021 Beginning balance $ 2,530 $ 2,778 $ 12,682 $ 1,557 $ 738 $ 998 $ 291 $ 1,300 $ 22,874 Provision (reversal) - CECL (880) (474) (1,826) (254) (218) (241) (36) 1,000 (2,929) Charge-offs — — — — — — — — — Recoveries 4 — — 9 — — — — 13 Ending balance $ 1,654 $ 2,304 $ 10,856 $ 1,312 $ 520 $ 757 $ 255 $ 2,300 $ 19,958 Three months ended March 31, 2020 Beginning balance $ 2,334 $ 2,462 $ 8,483 $ 638 $ 850 $ 973 $ 284 $ 653 $ 16,677 Provision - incurred loss 446 335 742 86 132 125 79 255 2,200 Charge-offs — — — — — — — — — Recoveries 4 — — 3 — — — — 7 Ending balance $ 2,784 $ 2,797 $ 9,225 $ 727 $ 982 $ 1,098 $ 363 $ 908 $ 18,884

Commitments and Contingencies -

Commitments and Contingencies - (Tables)	3 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Schedule of Undrawn Loan Commitments and Standby Letters of Credit	The contractual amount of unfunded loan commitments and standby letters of credit not reflected in the consolidated statements of condition are as follows: (in thousands) March 31, 2021 December 31, 2020 Commercial lines of credit $ 309,469 $ 287,533 Revolving home equity lines 199,332 189,035 Undisbursed construction loans 89,605 41,033 Personal and other lines of credit 10,431 9,567 Standby letters of credit 1,917 1,964 Total commitments and standby letters of credit $ 610,754 $ 529,132
Schedule of Operating and Finance Lease Right-of-Use Assets and Lease Liabilities	The following table shows the balances of operating and finance lease right-of-use assets and lease liabilities. (in thousands) March 31, 2021 December 31, 2020 Operating leases: Operating lease right-of-use assets $ 24,559 $ 25,612 Operating lease liabilities $ 25,993 $ 27,062 Finance leases: Finance lease right-of-use assets $ 62 $ 365 Accumulated amortization (31) (307) Finance lease right-of-use assets, net 1 $ 31 $ 58 Finance lease liabilities 2 $ 30 $ 58 1 Included in premises and equipment in the consolidated statements of condition. 2 Included in borrowings and other obligations in the consolidated statements of condition.
Schedule of Components of Operating and Finance Lease Cost	The following table shows supplemental disclosures of noncash investing and financing activities for the period presented. Three months ended (in thousands) March 31, 2021 March 31, 2020 Right-of-use assets obtained in exchange for operating lease liabilities $ — $ 12,178 Right-of-use assets obtained in exchange for finance lease liabilities $ — $ 18 The following table shows components of operating and finance lease cost. Three months ended (in thousands) March 31, 2021 March 31, 2020 Operating lease cost $ 1,164 $ 1,055 Variable lease cost — 2 Total operating lease cost 1 $ 1,164 $ 1,057 Finance lease cost: Amortization of right-of-use assets 2 $ 27 $ 44 Interest on finance lease liabilities 3 — 1 Total finance lease cost 27 45 Total lease cost $ 1,191 $ 1,102 1 Included in occupancy and equipment expense in the consolidated statements of comprehensive income. 2 Included in depreciation and amortization in the consolidated statements of comprehensive income. 3 Included in interest on borrowings and other obligations in the consolidated statements of comprehensive income.
Schedule of Operating Lease Liability Maturities	The following table shows the future minimum lease payments, weighted average remaining lease terms, and weighted average discount rates under operating and finance lease arrangements as of March 31, 2021. The discount rates used to calculate the present value of lease liabilities were based on the collateralized FHLB borrowing rates that were commensurate with lease terms and minimum payments on the later of the date we adopted the new lease accounting standards or lease commencement date. (in thousands) March 31, 2021 Year Operating Leases Finance Leases 2021 $ 3,431 $ 13 2022 4,424 14 2023 4,004 4 2024 3,300 — 2025 2,876 — Thereafter 9,867 — Total minimum lease payments 27,902 31 Amounts representing interest (present value discount) (1,909) (1) Present value of net minimum lease payments (lease liability) $ 25,993 $ 30 Weighted average remaining term (in years) 7.6 2.0 Weighted average discount rate 1.79 % 1.93 %
Schedule of Finance Lease Liability Maturities	The following table shows the future minimum lease payments, weighted average remaining lease terms, and weighted average discount rates under operating and finance lease arrangements as of March 31, 2021. The discount rates used to calculate the present value of lease liabilities were based on the collateralized FHLB borrowing rates that were commensurate with lease terms and minimum payments on the later of the date we adopted the new lease accounting standards or lease commencement date. (in thousands) March 31, 2021 Year Operating Leases Finance Leases 2021 $ 3,431 $ 13 2022 4,424 14 2023 4,004 4 2024 3,300 — 2025 2,876 — Thereafter 9,867 — Total minimum lease payments 27,902 31 Amounts representing interest (present value discount) (1,909) (1) Present value of net minimum lease payments (lease liability) $ 25,993 $ 30 Weighted average remaining term (in years) 7.6 2.0 Weighted average discount rate 1.79 % 1.93 %

Derivative Financial Instrume_2

Derivative Financial Instruments and Hedging Activities - (Tables)	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	Information on our derivatives follows: Asset Derivatives Liability Derivatives (in thousands) March 31, December 31, 2020 March 31, December 31, 2020 Fair value hedges: Interest rate contracts notional amount $ — $ — $ 13,754 $ 13,991 Interest rate contracts fair value 1 $ — $ — $ 1,193 $ 1,912 1 See Note 3, Fair Value of Assets and Liabilities, for valuation methodology. The following table presents the carrying amount and associated cumulative basis adjustment related to the application of fair value hedge accounting that is included in the carrying amount of hedged assets as of March 31, 2021 and December 31, 2020. Carrying Amounts of Hedged Assets Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Loans (in thousands) March 31, 2021 December 31, 2020 March 31, 2021 December 31, 2020 Loans $ 14,793 $ 15,745 $ 1,039 $ 1,753
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance	The following table presents the net losses recognized in interest income on loans on the consolidated statements of comprehensive income related to our derivatives designated as fair value hedges. Three months ended (in thousands) March 31, 2021 March 31, 2020 Interest and fees on loans 1 $ 20,661 $ 20,887 Increase (decrease) in fair value of designated interest rate swaps due to LIBOR interest rate movements $ 719 $ (1,440) Payment on interest rate swaps (93) (67) (Decrease) increase in value of hedged loans (714) 1,470 Decrease in value of yield maintenance agreement (3) (3) Net losses on fair value hedging relationships recognized in interest income $ (91) $ (40) 1 Represents the income line item in the statement of comprehensive income in which the effects of fair value hedges are recorded.
Offsetting Assets	Information on financial instruments that are eligible for offset in the consolidated statements of condition follows: Offsetting of Financial Assets and Derivative Assets Gross Amounts Net Amounts of Gross Amounts Not Offset in Gross Amounts Offset in the Assets Presented the Statements of Condition of Recognized Statements of in the Statements Financial Cash Collateral ( in thousands) Assets Condition of Condition Instruments Received Net Amount March 31, 2021 Derivatives by Counterparty: Counterparty A $ — $ — $ — $ — $ — $ — December 31, 2020 Derivatives by Counterparty: Counterparty A $ — $ — $ — $ — $ — $ —
Offsetting Liabilities	Offsetting of Financial Liabilities and Derivative Liabilities Gross Amounts Net Amounts of Gross Amounts Not Offset in Gross Amounts Offset in the Liabilities Presented the Statements of Condition of Recognized Statements of in the Statements Financial Cash Collateral (in thousands) Liabilities 1 Condition of Condition 1 Instruments Pledged Net Amount March 31, 2021 Derivatives by Counterparty: Counterparty A $ 1,193 $ — $ 1,193 $ — $ (1,193) $ — December 31, 2020 Derivatives by Counterparty: Counterparty A $ 1,912 $ — $ 1,912 $ — $ (1,912) $ — 1 Amounts exclude accrued interest on swaps.

Basis of Presentation - Reconci

Basis of Presentation - Reconciliation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Weighted average basic shares outstanding (in shares)	13,363	13,525
Potentially dilutive common shares related to:
Stock options (in shares)	81	106
Unvested restricted stock awards (in shares)	25	25
Weighted average diluted shares outstanding (in shares)	13,469	13,656
Net income	$ 8,947	$ 7,228
Basic EPS (in dollars per share)	$ 0.67	$ 0.53
Diluted EPS (in dollars per share)	$ 0.66	$ 0.53
Weighted average anti-dilutive shares not included in the calculation of diluted EPS (in shares)	80	70

Fair Value of Assets and Liab_3

Fair Value of Assets and Liabilities - Recorded on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 518,568	$ 392,351
SBA-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	29,218	32,862
Debentures of government- sponsored agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	74,473	20,186
Obligations of state and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	121,765	110,652
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	5,789
Assets and liabilities at fair value measured on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial liabilities (interest rate contracts)	0	0
Assets and liabilities at fair value measured on a recurring basis | Significant Other Observable Inputs (Level 2) | Interest rate contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial liabilities (interest rate contracts)	1,193	1,912
Assets and liabilities at fair value measured on a recurring basis | Significant Unobservable Inputs  (Level 3) | Interest rate contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial liabilities (interest rate contracts)	0	0
Assets and liabilities at fair value measured on a recurring basis | Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	287,323	228,651
Assets and liabilities at fair value measured on a recurring basis | Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies | Significant Unobservable Inputs  (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | SBA-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | SBA-backed securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	29,218	36,286
Assets and liabilities at fair value measured on a recurring basis | SBA-backed securities | Significant Unobservable Inputs  (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | Debentures of government- sponsored agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | Debentures of government- sponsored agencies | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	74,473	20,186
Assets and liabilities at fair value measured on a recurring basis | Debentures of government- sponsored agencies | Significant Unobservable Inputs  (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | Obligations of state and political subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | Obligations of state and political subdivisions | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	121,765	110,652
Assets and liabilities at fair value measured on a recurring basis | Obligations of state and political subdivisions | Significant Unobservable Inputs  (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Assets and liabilities at fair value measured on a recurring basis | Corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0
Assets and liabilities at fair value measured on a recurring basis | Corporate bonds | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	5,789
Assets and liabilities at fair value measured on a recurring basis | Corporate bonds | Significant Unobservable Inputs  (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0
Carrying Value | Assets and liabilities at fair value measured on a recurring basis | Interest rate contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial liabilities (interest rate contracts)	1,193	1,912
Carrying Value | Assets and liabilities at fair value measured on a recurring basis | Mortgage-backed securities and collateralized mortgage obligations issued by U.S. government-sponsored agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	287,323	228,651
Carrying Value | Assets and liabilities at fair value measured on a recurring basis | SBA-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	29,218	32,862
Carrying Value | Assets and liabilities at fair value measured on a recurring basis | Debentures of government- sponsored agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	74,473	20,186
Carrying Value | Assets and liabilities at fair value measured on a recurring basis | Obligations of state and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	121,765	$ 110,652
Carrying Value | Assets and liabilities at fair value measured on a recurring basis | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 5,789

Fair Value of Assets and Liab_4

Fair Value of Assets and Liabilities - Narrative (Details)	3 Months Ended
	Mar. 31, 2021USD ($)security	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)security
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Write down of held to maturity securities | $	$ 0	$ 0
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value, non-recurring basis | $	$ 0		$ 0
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of securities | security			0
Significant Unobservable Inputs  (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of securities | security	0

Fair Value of Assets and Liab_5

Fair Value of Assets and Liabilities - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financial assets (recorded at amortized cost)
Investment securities held-to-maturity	$ 156,756	$ 115,185
Carrying Amounts | Level 1
Financial assets (recorded at amortized cost)
Cash and cash equivalents	142,819	200,320
Carrying Amounts | Level 2
Financial assets (recorded at amortized cost)
Investment securities held-to-maturity	151,970	109,036
Interest receivable	10,589	10,922
Financial liabilities (recorded at amortized cost)
Time deposits	94,955	97,433
Interest payable	59	97
Carrying Amounts | Level 3
Financial assets (recorded at amortized cost)
Loans, net	2,101,814	2,065,682
Financial liabilities (recorded at amortized cost)
Subordinated debenture	0	2,777
Fair Value | Level 1
Financial assets (recorded at amortized cost)
Cash and cash equivalents	142,819	200,320
Fair Value | Level 2
Financial assets (recorded at amortized cost)
Investment securities held-to-maturity	156,756	115,185
Interest receivable	10,589	10,922
Financial liabilities (recorded at amortized cost)
Time deposits	95,241	97,769
Interest payable	59	97
Fair Value | Level 3
Financial assets (recorded at amortized cost)
Loans, net	2,114,691	2,089,192
Financial liabilities (recorded at amortized cost)
Subordinated debenture	$ 0	$ 3,115

Investment Securities - Held-to

Investment Securities - Held-to-Maturity Amortized Cost and Fair Value (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, amortized cost	$ 151,970,000	$ 109,036,000
Allowance for Credit Losses	0	0
Net Carrying Amount	151,970,000	109,036,000
Held-to-maturity, gross unrealized gains	4,975,000	6,149,000
Held-to-maturity, gross unrealized losses	(189,000)	0
Held to maturity, fair value	156,756,000	115,185,000
Accrued interest	295,000	366,000
MBS pass-through securities issued by FHLMC and FNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, amortized cost	78,227,000	65,579,000
Allowance for Credit Losses	0	0
Net Carrying Amount	78,227,000	65,579,000
Held-to-maturity, gross unrealized gains	3,283,000	3,924,000
Held-to-maturity, gross unrealized losses	0	0
Held to maturity, fair value	81,510,000	69,503,000
CMOs issued by FHLMC
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, amortized cost	30,207,000	27,201,000
Allowance for Credit Losses	0	0
Net Carrying Amount	30,207,000	27,201,000
Held-to-maturity, gross unrealized gains	1,105,000	1,441,000
Held-to-maturity, gross unrealized losses	(189,000)	0
Held to maturity, fair value	31,123,000	28,642,000
CMOs issued by FNMA
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, amortized cost	7,305,000	8,042,000
Allowance for Credit Losses	0	0
Net Carrying Amount	7,305,000	8,042,000
Held-to-maturity, gross unrealized gains	347,000	363,000
Held-to-maturity, gross unrealized losses	0	0
Held to maturity, fair value	7,652,000	8,405,000
SBA-backed securities
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, amortized cost	5,699,000	6,547,000
Allowance for Credit Losses	0	0
Net Carrying Amount	5,699,000	6,547,000
Held-to-maturity, gross unrealized gains	227,000	400,000
Held-to-maturity, gross unrealized losses	0	0
Held to maturity, fair value	5,926,000	6,947,000
Debentures of government- sponsored agencies
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, amortized cost	29,950,000
Allowance for Credit Losses	0
Net Carrying Amount	29,950,000
Held-to-maturity, gross unrealized gains	0
Held-to-maturity, gross unrealized losses	0
Held to maturity, fair value	29,950,000
Obligations of state and political subdivisions
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Held to maturity, amortized cost	582,000	1,667,000
Allowance for Credit Losses	0	0
Net Carrying Amount	582,000	1,667,000
Held-to-maturity, gross unrealized gains	13,000	21,000
Held-to-maturity, gross unrealized losses	0	0
Held to maturity, fair value	$ 595,000	$ 1,688,000

Investment Securities - Schedul

Investment Securities - Schedule of Bond Ratings For Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	$ 151,970	$ 109,036
Obligations of state and political subdivisions
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	582	$ 1,667
Moody's And/Or Standard & Poor's AA Rating | Obligations of state and political subdivisions
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	377
Moody's And/Or Standard & Poor's A Rating | Obligations of state and political subdivisions
Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items]
Debt securities, held-to-maturity	$ 205

Investment Securities - Availab

Investment Securities - Available-for-Sale Securities Amortized Cost and Fair Value (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Total	$ 508,337,000	$ 373,038,000
Available-for-sale, gross unrealized gains	13,752,000	19,393,000
Gross Unrealized (Losses)	(3,521,000)	(80,000)
Available-for-sale, allowance for credit Loss	0	0
Available-for-sale securities	518,568,000	392,351,000
Accrued interest	1,900,000	1,900,000
MBS pass-through securities issued by FHLMC and FNMA
Debt Securities, Available-for-sale [Line Items]
Total	65,871,000	50,686,000
Available-for-sale, gross unrealized gains	2,199,000	2,530,000
Gross Unrealized (Losses)	(56,000)	0
Available-for-sale, allowance for credit Loss	0	0
Available-for-sale securities	68,014,000	53,216,000
CMOs issued by FHLMC
Debt Securities, Available-for-sale [Line Items]
Total	168,589,000	143,267,000
Available-for-sale, gross unrealized gains	5,525,000	7,925,000
Gross Unrealized (Losses)	(948,000)	(1,000)
Available-for-sale, allowance for credit Loss	0	0
Available-for-sale securities	173,166,000	151,191,000
CMOs issued by FNMA
Debt Securities, Available-for-sale [Line Items]
Total	21,663,000	16,450,000
Available-for-sale, gross unrealized gains	537,000	580,000
Gross Unrealized (Losses)	(31,000)	0
Available-for-sale, allowance for credit Loss	0	0
Available-for-sale securities	22,169,000	17,030,000
CMOs issued by GNMA
Debt Securities, Available-for-sale [Line Items]
Total	23,738,000	6,863,000
Available-for-sale, gross unrealized gains	236,000	351,000
Gross Unrealized (Losses)	0	0
Available-for-sale, allowance for credit Loss	0	0
Available-for-sale securities	23,974,000	7,214,000
SBA-backed securities
Debt Securities, Available-for-sale [Line Items]
Total	28,059,000	30,941,000
Available-for-sale, gross unrealized gains	1,212,000	1,976,000
Gross Unrealized (Losses)	(53,000)	(55,000)
Available-for-sale, allowance for credit Loss	0	0
Available-for-sale securities	29,218,000	32,862,000
Debentures of government- sponsored agencies
Debt Securities, Available-for-sale [Line Items]
Total	76,313,000	19,944,000
Available-for-sale, gross unrealized gains	201,000	266,000
Gross Unrealized (Losses)	(2,041,000)	(24,000)
Available-for-sale, allowance for credit Loss	0	0
Available-for-sale securities	74,473,000	20,186,000
Obligations of state and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Total	118,118,000	104,887,000
Available-for-sale, gross unrealized gains	3,842,000	5,765,000
Gross Unrealized (Losses)	(195,000)	0
Available-for-sale, allowance for credit Loss	0	0
Available-for-sale securities	121,765,000	$ 110,652,000
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Total	5,986,000
Available-for-sale, gross unrealized gains	0
Gross Unrealized (Losses)	(197,000)
Available-for-sale, allowance for credit Loss	0
Available-for-sale securities	$ 5,789,000

Investment Securities - Maturit

Investment Securities - Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Held-to-maturity Securities, Amortized Cost
Within one year	$ 246	$ 246
After one but within five years	8,847	7,550
After five years through ten years	62,415	52,113
After ten years	80,462	49,127
Total	151,970	109,036
Held-to-maturity Securities, Fair Value
Within one year	248	250
After one but within five years	9,284	7,961
After five years through ten years	65,241	55,872
After ten years	81,983	51,102
Total	156,756	115,185
Available-for-sale Securities, Amortized Cost
Within one year	15,013	11,530
After one but within five years	55,101	59,028
After five years through ten years	193,424	144,908
After ten years	244,799	157,572
Total	508,337	373,038
Available-for-sale Securities, Fair Value
Within one year	15,219	11,687
After one but within five years	57,955	62,397
After five years through ten years	198,301	154,089
After ten years	247,093	164,178
Total	$ 518,568	$ 392,351

Investment Securities - Sales o

Investment Securities - Sales of investment securities and gross gains (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Available-for-sale:
Sales proceeds	$ 0	$ 27,442
Gross realized gains	$ 0	$ 800

Investment Securities - Pledged

Investment Securities - Pledged and Transferred Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financial Instruments Owned and Pledged as Collateral [Line Items]
Available-for-sale securities pledged as collateral	$ 124,434	$ 132,431
Public deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Available-for-sale securities pledged as collateral	123,085	131,051
Trust deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Available-for-sale securities pledged as collateral	735	751
State of California
Financial Instruments Owned and Pledged as Collateral [Line Items]
Available-for-sale securities pledged as collateral	123,820	131,802
Internal checking account
Financial Instruments Owned and Pledged as Collateral [Line Items]
Available-for-sale securities pledged as collateral	$ 614	$ 629

Investment Securities - Narrati

Investment Securities - Narrative (Details) - security	Mar. 31, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Number of investment securities in unrealized loss position	29	10
Number of investment securities in unrealized loss position longer than 12 months	5
Number of investment securities in unrealized loss position less than 12 months	24

Investment Securities - Unreali

Investment Securities - Unrealized Loss Positions (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available-for-sale, less than 12 continuous months, fair value	$ 137,582	$ 9,918
Available-for-sale, greater than 12 continuous months, fair value	1,699	1,790
Available-for-sale, total securities in a loss position, fair value	139,281	11,708
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, unrealized loss	(3,468)	(25)
Available-for-sale, greater than 12 continuous months, unrealized loss	(53)	(55)
Available-for-sale, total securities in a loss position, unrealized loss	(3,521)	(80)
Marketable Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Marketable securities, less than 12 continuous months, fair value	141,817	9,918
Marketable securities, greater than 12 continuous months, fair value	1,699	1,790
Marketable securities, total securities in a loss position, fair value	143,516	11,708
Marketable Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Marketable securities, less than 12 continuous months, unrealized loss	(3,657)	(25)
Marketable securities, greater than 12 continuous months, unrealized loss	(53)	(55)
Marketable securities, total securities in a loss position, unrealized loss	(3,710)	(80)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 continuous months	4,235
Greater than or equal to 12 continuous months	0
Total Securities in a loss position	4,235
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 continuous months	(189)
Greater than or equal to 12 continuous months	0
Held-to-maturity, gross unrealized losses	(189)
MBS pass-through securities issued by FHLMC and FNMA
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available-for-sale, less than 12 continuous months, fair value	10,013
Available-for-sale, greater than 12 continuous months, fair value	0
Available-for-sale, total securities in a loss position, fair value	10,013
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, unrealized loss	(56)
Available-for-sale, greater than 12 continuous months, unrealized loss	0
Available-for-sale, total securities in a loss position, unrealized loss	(56)
SBA-backed securities
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available-for-sale, less than 12 continuous months, fair value	0	0
Available-for-sale, greater than 12 continuous months, fair value	1,699	1,790
Available-for-sale, total securities in a loss position, fair value	1,699	1,790
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, unrealized loss	0	0
Available-for-sale, greater than 12 continuous months, unrealized loss	(53)	(55)
Available-for-sale, total securities in a loss position, unrealized loss	(53)	(55)
CMOs issued by FNMA
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available-for-sale, less than 12 continuous months, fair value	7,304
Available-for-sale, greater than 12 continuous months, fair value	0
Available-for-sale, total securities in a loss position, fair value	7,304
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, unrealized loss	(31)
Available-for-sale, greater than 12 continuous months, unrealized loss	0
Available-for-sale, total securities in a loss position, unrealized loss	(31)
CMOs issued by FHLMC
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available-for-sale, less than 12 continuous months, fair value	32,658	5,975
Available-for-sale, greater than 12 continuous months, fair value	0	0
Available-for-sale, total securities in a loss position, fair value	32,658	5,975
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, unrealized loss	(948)	(1)
Available-for-sale, greater than 12 continuous months, unrealized loss	0	0
Available-for-sale, total securities in a loss position, unrealized loss	(948)	(1)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]
Less than 12 continuous months	4,235
Greater than or equal to 12 continuous months	0
Total Securities in a loss position	4,235
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]
Less than 12 continuous months	(189)
Greater than or equal to 12 continuous months	0
Held-to-maturity, gross unrealized losses	(189)
Debentures of government- sponsored agencies
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available-for-sale, less than 12 continuous months, fair value	53,289	3,943
Available-for-sale, greater than 12 continuous months, fair value	0	0
Available-for-sale, total securities in a loss position, fair value	53,289	3,943
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, unrealized loss	(2,041)	(24)
Available-for-sale, greater than 12 continuous months, unrealized loss	0	0
Available-for-sale, total securities in a loss position, unrealized loss	(2,041)	$ (24)
Obligations of state and political subdivisions
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available-for-sale, less than 12 continuous months, fair value	28,529
Available-for-sale, greater than 12 continuous months, fair value	0
Available-for-sale, total securities in a loss position, fair value	28,529
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, unrealized loss	(195)
Available-for-sale, greater than 12 continuous months, unrealized loss	0
Available-for-sale, total securities in a loss position, unrealized loss	(195)
Corporate bonds
Debt Securities, Available-For-Sale, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available-for-sale, less than 12 continuous months, fair value	5,789
Available-for-sale, greater than 12 continuous months, fair value	0
Available-for-sale, total securities in a loss position, fair value	5,789
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale, less than 12 continuous months, unrealized loss	(197)
Available-for-sale, greater than 12 continuous months, unrealized loss	0
Available-for-sale, total securities in a loss position, unrealized loss	$ (197)

Investment Securities - Non-Mar

Investment Securities - Non-Marketable Securities Included in Other Assets (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2021USD ($)$ / sharesshares	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)shares	Apr. 29, 2021
Schedule of Equity Method Investments [Line Items]
Federal home loan bank stock, par value (in usd per share) | $ / shares	$ 100
Investments in low income housing tax credit funds	$ 3,400,000		$ 3,500,000
Low income housing tax credits and other tax benefits	160,000
Low income housing amortization expense	135,000
Unfunded commitments for low income housing tax credit funds	$ 508,000
Subsequent event
Schedule of Equity Method Investments [Line Items]
Federal home loan bank, dividend rate percentage				6.00%
Visa Inc. Class B common stock
Schedule of Equity Method Investments [Line Items]
Number of shares of securities carried at cost (in shares) | shares	10,439		10,439
Carrying value of securities carried at cost	$ 0		$ 0
Fair value of Class B common stock	$ 3,600,000		$ 3,700,000
Visa Inc. | Visa Inc. Class B common stock
Schedule of Equity Method Investments [Line Items]
Conversion rate on common stock	1.6228		1.6228
Asset Derivatives
Schedule of Equity Method Investments [Line Items]
Federal home loan bank stock	$ 11,900,000		$ 11,900,000
Low-income housing tax credit investment
Schedule of Equity Method Investments [Line Items]
Impairment losses	$ 0	$ 0

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses - Schedule of Loans by Class (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	$ 2,121,772	$ 2,088,556
Allowance for credit losses	(19,958)	(22,874)
Loans, net of allowance for credit losses	2,101,814	2,065,682
Deferred loan fees	(6,700)	(4,900)
Unrecognized purchase discounts on non-PCI loans	782	815
Financing receivable, accrued interest, net	8,500	8,800
Commercial loans | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	545,069	498,408
Allowance for credit losses	(1,654)	(2,530)
Commercial real estate loans | Commercial owner-occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	308,266	304,963
Allowance for credit losses	(2,304)	(2,778)
Commercial real estate loans | Commercial investor-owned
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	955,021	961,208
Allowance for credit losses	(10,856)	(12,682)
Commercial real estate loans | Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	71,066	73,046
Allowance for credit losses	(1,312)	(1,557)
Residential loans | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	96,575	104,813
Allowance for credit losses	(520)	(738)
Residential loans | Other residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	124,383	123,395
Allowance for credit losses	(757)	(998)
Consumer loans | Installment and other consumer loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans, at amortized cost	21,392	22,723
Allowance for credit losses	$ (255)	$ (291)

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses - CARES Act Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)loan	Dec. 31, 2020USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	$ 2,121,772	$ 2,088,556
SBA PPP
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | loan	2,513
SBA PPP Round Two
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans funded during period | loan	841
Commercial loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	$ 545,069	498,408
Commercial loans | Commercial and industrial | SBA PPP
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	365,000	291,600
Financing receivable, unamortized loan fee	8,000	$ 5,400
Commercial loans | Commercial and industrial | SBA PPP Round Two
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in finance receivables	$ 119,500

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses - Schedule of Loans by Risk Grade and Origination Year (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	$ 170,032	$ 578,922
Financing receivable, originated, year two	530,483	275,977
Financing receivable, originated, year three	264,720	275,069
Financing receivable, originated, year four	266,404	180,349
Financing receivable, originated, year five	164,668	138,246
Prior	542,084	428,702
Revolving Loans Amortized Cost	183,381	211,291
Total	2,121,772	2,088,556
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	170,032	570,028
Financing receivable, originated, year two	521,687	260,532
Financing receivable, originated, year three	253,698	257,552
Financing receivable, originated, year four	259,015	161,310
Financing receivable, originated, year five	145,666	123,131
Prior	515,612	412,109
Revolving Loans Amortized Cost	173,652	191,213
Total	2,039,362	1,975,875
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	12,729
Financing receivable, originated, year three	7,620	13,082
Financing receivable, originated, year four	2,961	19,022
Financing receivable, originated, year five	19,002	7,354
Prior	17,452	14,774
Revolving Loans Amortized Cost	8,954	19,891
Total	55,989	86,852
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	8,894
Financing receivable, originated, year two	8,796	2,716
Financing receivable, originated, year three	3,402	4,435
Financing receivable, originated, year four	4,428	17
Financing receivable, originated, year five	0	7,761
Prior	9,020	1,819
Revolving Loans Amortized Cost	775	187
Total	26,421	25,829
Commercial loans | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	116,598	309,984
Financing receivable, originated, year two	266,487	24,623
Financing receivable, originated, year three	22,403	13,914
Financing receivable, originated, year four	12,290	4,649
Financing receivable, originated, year five	4,226	5,926
Prior	36,873	34,331
Revolving Loans Amortized Cost	86,192	104,981
Total	545,069	498,408
Commercial loans | Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	116,598	308,237
Financing receivable, originated, year two	264,838	22,589
Financing receivable, originated, year three	21,201	12,596
Financing receivable, originated, year four	11,692	4,508
Financing receivable, originated, year five	4,111	5,915
Prior	36,865	34,282
Revolving Loans Amortized Cost	76,742	85,889
Total	532,047	474,016
Commercial loans | Commercial and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	2,034
Financing receivable, originated, year three	812	1,318
Financing receivable, originated, year four	598	141
Financing receivable, originated, year five	115	11
Prior	8	49
Revolving Loans Amortized Cost	8,954	19,092
Total	10,487	22,645
Commercial loans | Commercial and industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	1,747
Financing receivable, originated, year two	1,649	0
Financing receivable, originated, year three	390	0
Financing receivable, originated, year four	0	0
Financing receivable, originated, year five	0	0
Prior	0	0
Revolving Loans Amortized Cost	496	0
Total	2,535	1,747
Commercial real estate loans | Commercial owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	10,035	38,176
Financing receivable, originated, year two	37,606	27,581
Financing receivable, originated, year three	27,444	44,367
Financing receivable, originated, year four	44,179	60,905
Financing receivable, originated, year five	59,038	26,319
Prior	129,964	107,615
Revolving Loans Amortized Cost	0	0
Total	308,266	304,963
Commercial real estate loans | Commercial owner-occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	10,035	31,029
Financing receivable, originated, year two	30,459	27,581
Financing receivable, originated, year three	27,147	32,603
Financing receivable, originated, year four	41,816	43,843
Financing receivable, originated, year five	41,962	12,768
Prior	110,896	101,014
Revolving Loans Amortized Cost	0	0
Total	262,315	248,838
Commercial real estate loans | Commercial owner-occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	0
Financing receivable, originated, year three	0	11,764
Financing receivable, originated, year four	2,363	17,062
Financing receivable, originated, year five	17,076	7,343
Prior	12,863	6,601
Revolving Loans Amortized Cost	0	0
Total	32,302	42,770
Commercial real estate loans | Commercial owner-occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	7,147
Financing receivable, originated, year two	7,147	0
Financing receivable, originated, year three	297	0
Financing receivable, originated, year four	0	0
Financing receivable, originated, year five	0	6,208
Prior	6,205	0
Revolving Loans Amortized Cost	0	0
Total	13,649	13,355
Commercial real estate loans | Commercial investor-owned
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	29,585	162,300
Financing receivable, originated, year two	161,213	158,162
Financing receivable, originated, year three	156,060	178,390
Financing receivable, originated, year four	174,581	102,661
Financing receivable, originated, year five	89,624	96,415
Prior	343,848	263,163
Revolving Loans Amortized Cost	110	117
Total	955,021	961,208
Commercial real estate loans | Commercial investor-owned | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	29,585	162,300
Financing receivable, originated, year two	161,213	144,751
Financing receivable, originated, year three	146,537	173,955
Financing receivable, originated, year four	170,153	100,842
Financing receivable, originated, year five	87,813	94,862
Prior	336,840	253,611
Revolving Loans Amortized Cost	110	117
Total	932,251	930,438
Commercial real estate loans | Commercial investor-owned | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	10,695
Financing receivable, originated, year three	6,808	0
Financing receivable, originated, year four	0	1,819
Financing receivable, originated, year five	1,811	0
Prior	4,581	8,124
Revolving Loans Amortized Cost	0	0
Total	13,200	20,638
Commercial real estate loans | Commercial investor-owned | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	2,716
Financing receivable, originated, year three	2,715	4,435
Financing receivable, originated, year four	4,428	0
Financing receivable, originated, year five	0	1,553
Prior	2,427	1,428
Revolving Loans Amortized Cost	0	0
Total	9,570	10,132
Commercial real estate loans | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	6,533	31,654
Financing receivable, originated, year two	29,510	30,150
Financing receivable, originated, year three	26,108	11,242
Financing receivable, originated, year four	8,915	0
Financing receivable, originated, year five	0	0
Prior	0	0
Revolving Loans Amortized Cost	0	0
Total	71,066	73,046
Commercial real estate loans | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	6,533	31,654
Financing receivable, originated, year two	29,510	30,150
Financing receivable, originated, year three	26,108	11,242
Financing receivable, originated, year four	8,915	0
Financing receivable, originated, year five	0	0
Prior	0	0
Revolving Loans Amortized Cost	0	0
Total	71,066	73,046
Commercial real estate loans | Construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	0
Financing receivable, originated, year three	0	0
Financing receivable, originated, year four	0	0
Financing receivable, originated, year five	0	0
Prior	0	0
Revolving Loans Amortized Cost	0	0
Total	0	0
Commercial real estate loans | Construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	0
Financing receivable, originated, year three	0	0
Financing receivable, originated, year four	0	0
Financing receivable, originated, year five	0	0
Prior	0	0
Revolving Loans Amortized Cost	0	0
Total	0	0
Residential loans | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	0
Financing receivable, originated, year three	0	0
Financing receivable, originated, year four	0	0
Financing receivable, originated, year five	0	128
Prior	1,181	1,085
Revolving Loans Amortized Cost	95,394	103,600
Total	96,575	104,813
Residential loans | Home equity | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	0
Financing receivable, originated, year three	0	0
Financing receivable, originated, year four	0	0
Financing receivable, originated, year five	0	128
Prior	793	694
Revolving Loans Amortized Cost	95,115	102,614
Total	95,908	103,436
Residential loans | Home equity | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	0
Financing receivable, originated, year three	0	0
Financing receivable, originated, year four	0	0
Financing receivable, originated, year five	0	0
Prior	0	0
Revolving Loans Amortized Cost	0	799
Total	0	799
Residential loans | Home equity | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	0
Financing receivable, originated, year three	0	0
Financing receivable, originated, year four	0	0
Financing receivable, originated, year five	0	0
Prior	388	391
Revolving Loans Amortized Cost	279	187
Total	667	578
Residential loans | Other residential
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	5,524	34,447
Financing receivable, originated, year two	33,498	31,079
Financing receivable, originated, year three	29,371	23,673
Financing receivable, originated, year four	23,363	10,574
Financing receivable, originated, year five	10,520	6,035
Prior	22,107	17,587
Revolving Loans Amortized Cost	0	0
Total	124,383	123,395
Residential loans | Other residential | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	5,524	34,447
Financing receivable, originated, year two	33,498	31,079
Financing receivable, originated, year three	29,371	23,673
Financing receivable, originated, year four	23,363	10,574
Financing receivable, originated, year five	10,520	6,035
Prior	22,107	17,587
Revolving Loans Amortized Cost	0	0
Total	124,383	123,395
Residential loans | Other residential | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	0
Financing receivable, originated, year three	0	0
Financing receivable, originated, year four	0	0
Financing receivable, originated, year five	0	0
Prior	0	0
Revolving Loans Amortized Cost	0	0
Total	0	0
Residential loans | Other residential | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	0
Financing receivable, originated, year three	0	0
Financing receivable, originated, year four	0	0
Financing receivable, originated, year five	0	0
Prior	0	0
Revolving Loans Amortized Cost	0	0
Total	0	0
Consumer loans | Installment and other consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	1,757	2,361
Financing receivable, originated, year two	2,169	4,382
Financing receivable, originated, year three	3,334	3,483
Financing receivable, originated, year four	3,076	1,560
Financing receivable, originated, year five	1,260	3,423
Prior	8,111	4,921
Revolving Loans Amortized Cost	1,685	2,593
Total	21,392	22,723
Consumer loans | Installment and other consumer loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	1,757	2,361
Financing receivable, originated, year two	2,169	4,382
Financing receivable, originated, year three	3,334	3,483
Financing receivable, originated, year four	3,076	1,543
Financing receivable, originated, year five	1,260	3,423
Prior	8,111	4,921
Revolving Loans Amortized Cost	1,685	2,593
Total	21,392	22,706
Consumer loans | Installment and other consumer loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	0
Financing receivable, originated, year three	0	0
Financing receivable, originated, year four	0	0
Financing receivable, originated, year five	0	0
Prior	0	0
Revolving Loans Amortized Cost	0	0
Total	0	0
Consumer loans | Installment and other consumer loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing receivable, originated, year one	0	0
Financing receivable, originated, year two	0	0
Financing receivable, originated, year three	0	0
Financing receivable, originated, year four	0	17
Financing receivable, originated, year five	0	0
Prior	0	0
Revolving Loans Amortized Cost	0	0
Total	$ 0	$ 17

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses - Outstanding and Aging Analysis (Details)	3 Months Ended
	Mar. 31, 2021USD ($)loan	Mar. 31, 2020USD ($)	Dec. 31, 2020USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 2,121,772,000		$ 2,088,556,000
Non-accrual loans with no allowance	9,205,000		9,233,000
Loans past due more than 90 days still accruing	0		0
Financing receivable, nonaccrual, earning interest on cash basis	0		0
Financing receivable, nonaccrual, interest income	$ 0	$ 0
Financing receivable, number of loans placed on nonaccrual status | loan	0
Financing receivable, accrued interest, writeoff	$ 13,000
Commercial loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	545,069,000		498,408,000
Non-accrual loans with no allowance	0		0
Commercial real estate loans | Commercial owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	308,266,000		304,963,000
Non-accrual loans with no allowance	7,147,000		7,147,000
Commercial real estate loans | Commercial investor-owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	955,021,000		961,208,000
Non-accrual loans with no allowance	1,603,000		1,610,000
Commercial real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	71,066,000		73,046,000
Non-accrual loans with no allowance	0		0
Residential loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	96,575,000		104,813,000
Non-accrual loans with no allowance	455,000		459,000
Residential loans | Other residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	124,383,000		123,395,000
Non-accrual loans with no allowance	0		0
Consumer loans | Installment and other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	21,392,000		22,723,000
Non-accrual loans with no allowance	0		17,000
Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	2,021,000		2,705,000
Current	2,119,751,000		2,085,851,000
Total	2,121,772,000		2,088,556,000
Non-accrual	9,205,000
Financial asset, other than financial asset acquired with credit deterioration | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	1,047,000		2,083,000
Non-accrual	9,233,000
Financial asset, other than financial asset acquired with credit deterioration | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	96,000		622,000
Financial asset, other than financial asset acquired with credit deterioration | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	878,000		0
Financial asset, other than financial asset acquired with credit deterioration | Commercial loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Current	545,069,000		498,408,000
Total	545,069,000		498,408,000
Non-accrual	0
Financial asset, other than financial asset acquired with credit deterioration | Commercial loans | Commercial and industrial | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Non-accrual	0
Financial asset, other than financial asset acquired with credit deterioration | Commercial loans | Commercial and industrial | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Financial asset, other than financial asset acquired with credit deterioration | Commercial loans | Commercial and industrial | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Current	308,266,000		304,963,000
Total	308,266,000		304,963,000
Non-accrual	7,147,000
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial owner-occupied | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Non-accrual	7,147,000
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial owner-occupied | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial owner-occupied | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial investor-owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	1,669,000		1,673,000
Current	953,352,000		959,535,000
Total	955,021,000		961,208,000
Non-accrual	1,603,000
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial investor-owned | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	791,000		1,673,000
Non-accrual	1,610,000
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial investor-owned | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Commercial investor-owned | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	878,000		0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Current	71,066,000		73,046,000
Total	71,066,000		73,046,000
Non-accrual	0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Construction | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Non-accrual	0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Construction | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Financial asset, other than financial asset acquired with credit deterioration | Commercial real estate loans | Construction | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	216,000		274,000
Current	96,359,000		104,539,000
Total	96,575,000		104,813,000
Non-accrual	455,000
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Home equity | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	120,000		274,000
Non-accrual	459,000
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Home equity | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	96,000		0
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Home equity | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Other residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Current	124,383,000		123,395,000
Total	124,383,000		123,395,000
Non-accrual	0
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Other residential | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Non-accrual	0
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Other residential | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Financial asset, other than financial asset acquired with credit deterioration | Residential loans | Other residential | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		0
Financial asset, other than financial asset acquired with credit deterioration | Consumer loans | Installment and other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	136,000		758,000
Current	21,256,000		21,965,000
Total	21,392,000		22,723,000
Non-accrual	0
Financial asset, other than financial asset acquired with credit deterioration | Consumer loans | Installment and other consumer loans | 30-59 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	136,000		136,000
Non-accrual	17,000
Financial asset, other than financial asset acquired with credit deterioration | Consumer loans | Installment and other consumer loans | 60-89 days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	0		622,000
Financial asset, other than financial asset acquired with credit deterioration | Consumer loans | Installment and other consumer loans | 90 days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans past due	$ 0		$ 0

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses - Schedule of Collateral-Dependent Non-Accrual Loans (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	$ 19,958,000	$ 22,874,000
Weighted average ratio of loans value to collateral dependent loans value	59.20%	59.20%
Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	$ 9,204,000	$ 9,233,000
Allowance for credit losses	0	0
Nonaccrual collateral dependent loans in process of foreclosure	0	0
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	8,750,000	8,757,000
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	454,000	459,000
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	0	17,000
Commercial real estate loans | Commercial owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	2,304,000	2,778,000
Commercial real estate loans | Commercial owner-occupied | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	7,147,000	7,147,000
Allowance for credit losses	0	0
Commercial real estate loans | Commercial owner-occupied | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	7,147,000	7,147,000
Commercial real estate loans | Commercial owner-occupied | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	0	0
Commercial real estate loans | Commercial owner-occupied | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	0	0
Commercial real estate loans | Commercial investor-owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	10,856,000	12,682,000
Commercial real estate loans | Commercial investor-owned | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	1,603,000	1,610,000
Allowance for credit losses	0	0
Commercial real estate loans | Commercial investor-owned | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	1,603,000	1,610,000
Commercial real estate loans | Commercial investor-owned | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	0	0
Commercial real estate loans | Commercial investor-owned | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	0	0
Residential loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	520,000	738,000
Residential loans | Home equity | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	454,000	459,000
Allowance for credit losses	0	0
Residential loans | Home equity | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	0	0
Residential loans | Home equity | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	454,000	459,000
Residential loans | Home equity | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	0	0
Consumer loans | Installment and other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	$ 255,000	291,000
Consumer loans | Installment and other consumer loans | Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		17,000
Allowance for credit losses		0
Consumer loans | Installment and other consumer loans | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		0
Consumer loans | Installment and other consumer loans | Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		0
Consumer loans | Installment and other consumer loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual		$ 17,000

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses - Troubled Debt Restructuring Narrative (Details) $ in Thousands	1 Months Ended	3 Months Ended
	May 07, 2021USD ($)borrowingRelationshiploan	Mar. 31, 2021USD ($)loanborrowingRelationship
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans removed from TDR designation		0
Financing receivable, loan modifications under CARES Act, payment relief, number of borrowing relationships | borrowingRelationship		13
Financing receivable, loan modifications under CARES Act, payment relief		20
Financing receivable, modified under CARES Act, payment relief | $		$ 65,400
Financing receivable, weighted average loan-to-value ratio, modified under CARES Act, remaining payment relief		40.00%
Subsequent event
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, loan modifications under CARES Act during period, borrowing relationships, subsequently resumed payments | borrowingRelationship	2
Financing receivable, loan modifications under CARES Act during period, subsequently resumed payments	3
Financing receivable, modified under CARES Act during period, subsequently resumed payments | $	$ 6,200

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses - Troubled Debt Restructuring by Class (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in troubled debt restructurings	$ 10,775	$ 12,506
Financing receivable, modifications, recorded investment, nonaccrual status	7,400	7,400
Unfunded commitments for TDR loans	845
Commercial loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in troubled debt restructurings	854	1,021
Commercial real estate loans | Commercial owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in troubled debt restructurings	7,147	7,147
Commercial real estate loans | Commercial investor-owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in troubled debt restructurings	1,741	3,305
Residential loans | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in troubled debt restructurings	277	281
Consumer loans | Installment and other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment in troubled debt restructurings	$ 756	$ 752

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses - Troubled Debt Restructuring Modifications (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)loancontract	Mar. 31, 2020USD ($)loancontract
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts Modified | contract	0	3
Pre-Modification Outstanding Recorded Investment	$ 0	$ 273
Post-Modification Outstanding Recorded Investment	0	265
Post-Modification Outstanding Recorded Investment at Period End	$ 0	$ 247
Number of modified TDR loans that defaulted | loan	0	0
Commercial and industrial | Commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts Modified | contract		1
Pre-Modification Outstanding Recorded Investment		$ 170
Post-Modification Outstanding Recorded Investment		162
Post-Modification Outstanding Recorded Investment at Period End		$ 144
Installment and other consumer loans | Consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Contracts Modified | contract		2
Pre-Modification Outstanding Recorded Investment		$ 103
Post-Modification Outstanding Recorded Investment		103
Post-Modification Outstanding Recorded Investment at Period End		$ 103

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 22,874
Provision (reversal) - CECL	(2,929)
Charge-offs	0
Recoveries	13
Ending balance	19,958
Beginning balance		$ 16,677
Provision (reversal) - CECL	(2,929)	2,200
Charge-offs		0
Recoveries		7
Ending balance		18,884
Commercial loans | Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,530
Provision (reversal) - CECL	(880)
Charge-offs	0
Recoveries	4
Ending balance	1,654
Beginning balance		2,334
Provision (reversal) - CECL		446
Charge-offs		0
Recoveries		4
Ending balance		2,784
Commercial real estate loans | Commercial owner-occupied
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,778
Provision (reversal) - CECL	(474)
Charge-offs	0
Recoveries	0
Ending balance	2,304
Beginning balance		2,462
Provision (reversal) - CECL		335
Charge-offs		0
Recoveries		0
Ending balance		2,797
Commercial real estate loans | Commercial investor-owned
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	12,682
Provision (reversal) - CECL	(1,826)
Charge-offs	0
Recoveries	0
Ending balance	10,856
Beginning balance		8,483
Provision (reversal) - CECL		742
Charge-offs		0
Recoveries		0
Ending balance		9,225
Commercial real estate loans | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,557
Provision (reversal) - CECL	(254)
Charge-offs	0
Recoveries	9
Ending balance	1,312
Beginning balance		638
Provision (reversal) - CECL		86
Charge-offs		0
Recoveries		3
Ending balance		727
Residential loans | Home equity
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	738
Provision (reversal) - CECL	(218)
Charge-offs	0
Recoveries	0
Ending balance	520
Beginning balance		850
Provision (reversal) - CECL		132
Charge-offs		0
Recoveries		0
Ending balance		982
Residential loans | Other residential
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	998
Provision (reversal) - CECL	(241)
Charge-offs	0
Recoveries	0
Ending balance	757
Beginning balance		973
Provision (reversal) - CECL		125
Charge-offs		0
Recoveries		0
Ending balance		1,098
Consumer loans | Installment and other consumer loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	291
Provision (reversal) - CECL	(36)
Charge-offs	0
Recoveries	0
Ending balance	255
Beginning balance		284
Provision (reversal) - CECL		79
Charge-offs		0
Recoveries		0
Ending balance		363
Unallocated
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,300
Provision (reversal) - CECL	1,000
Charge-offs	0
Recoveries	0
Ending balance	$ 2,300
Beginning balance		653
Provision (reversal) - CECL		255
Charge-offs		0
Recoveries		0
Ending balance		$ 908

Loans and Allowance for Cred_12

Loans and Allowance for Credit Losses - Pledged Loans (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Financial Instruments Owned and Pledged as Collateral [Line Items]
Residential loans pledged for FRB borrowings	$ 1,103	$ 1,165
Other residential
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged residential loan portfolio to secure borrowing with FRB	$ 112.4	$ 113.6

Loans and Allowance for Cred_13

Loans and Allowance for Credit Losses - Related Party (Details) - Directors, officers, principal shareholders and associates - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Related party loans	$ 5.9	$ 6.4
Undisbursed commitment to related parties	$ 9.1	$ 9.1

Borrowings and Other Obligati_2

Borrowings and Other Obligations - Lines of Credit (Details) - Line of credit - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Federal funds purchased
Line of Credit Facility [Line Items]
Amount of borrowings outstanding	$ 0	$ 0
Federal home loan bank borrowings
Line of Credit Facility [Line Items]
Lines of credit	634,200,000	642,500,000
Federal home loan bank overnight borrowings
Line of Credit Facility [Line Items]
Amount of borrowings outstanding	0	0
Federal reserve line of credit
Line of Credit Facility [Line Items]
Lines of credit	77,500,000	78,700,000
Amount of borrowings outstanding	0	0
Unsecured debt | Federal funds purchased
Line of Credit Facility [Line Items]
Lines of credit	$ 135,000,000	$ 135,000,000

Borrowings and Other Obligati_3

Borrowings and Other Obligations - Subordinated Debt (Details) - USD ($) $ in Thousands	Mar. 15, 2021	Mar. 31, 2021	Mar. 31, 2020	Nov. 29, 2013
Debt Instrument [Line Items]
Accretion of discount on subordinated debenture		$ 1,347	$ 17
Subordinated debenture | NorCal Community Bancorp Trust II
Debt Instrument [Line Items]
Contractual value of subordinated debt				$ 4,100
Repayments of debt	$ 2,800
Effective interest rate	5.70%
Accretion of discount on subordinated debenture	$ 1,300		$ 17

Stockholders' Equity - Narrativ

Stockholders' Equity - Narrative (Details) - USD ($)	Apr. 16, 2021	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Jan. 24, 2020	Apr. 23, 2018
Class of Stock [Line Items]
Shares withheld for tax withholding and exercise of options (in shares)		27,547	8,409
Amount of shares withheld for tax withholding and exercise of options		$ 1,100,000	$ 346,000
Shares withheld for tax withholding and exercise of options, weighted average price (in usd per share)		$ 38.87	$ 41.17
Share repurchase program, amount approved to repurchase					$ 25,000,000	$ 25,000,000
Stock repurchased, net of commissions		$ 8,511,000	$ 3,230,000	$ 14,300,000
Subsequent event
Class of Stock [Line Items]
Dividends declared per common share (in usd per share)	$ 0.23
Common Stock
Class of Stock [Line Items]
Stock repurchased, net of commissions (in shares)		224,013	92,664	393,594
Stock repurchased, net of commissions		$ 8,511,000	$ 3,230,000
Performance-based stock awards
Class of Stock [Line Items]
Vesting period of performance-based stock awards		3 years
Performance-based stock awards | Minimum
Class of Stock [Line Items]
Vesting percentage of performance-based awards		0.00%
Performance-based stock awards | Maximum
Class of Stock [Line Items]
Vesting percentage of performance-based awards		200.00%

Commitments and Contingencies_2

Commitments and Contingencies - Off Balance Sheet Arrangements (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Total commitments and standby letters of credit
Other Commitments [Line Items]
Total commitments and standby letters of credit	$ 610,754	$ 529,132
Commercial lines of credit
Other Commitments [Line Items]
Total commitments and standby letters of credit	309,469	287,533
Revolving home equity lines
Other Commitments [Line Items]
Total commitments and standby letters of credit	199,332	189,035
Undisbursed construction loans
Other Commitments [Line Items]
Total commitments and standby letters of credit	89,605	41,033
Personal and other lines of credit
Other Commitments [Line Items]
Total commitments and standby letters of credit	10,431	9,567
Standby letters of credit
Other Commitments [Line Items]
Total commitments and standby letters of credit	$ 1,917	$ 1,964

Commitments and Contingencies_3

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2012	Dec. 31, 2020
Loss Contingencies [Line Items]
Unfunded commitments credit loss (reversal) provision		$ (590)
Litigation Matters
Restricted cash and cash equivalents	[1]	0	$ 0
Unfunded Loan Commitment
Loss Contingencies [Line Items]
Unfunded commitments credit loss (reversal) provision			$ (102)
Visa Inc.
Litigation Matters
Settlement agreement amount				$ 4,000,000
Restricted cash and cash equivalents		$ 894
Minimum
Loss Contingencies [Line Items]
Weighted average remaining term (in years)		1 year
Finance lease, initial contract terms (in years)		3 years
Maximum
Loss Contingencies [Line Items]
Weighted average remaining term (in years)		12 years
Finance lease, initial contract terms (in years)		5 years
Total commitments and standby letters of credit | Interest payable and other liabilities
Loss Contingencies [Line Items]
Allowance for off balance sheet commitments		$ 2,200			$ 2,800
[1]	Restricted cash includes reserve requirements held with the Federal Reserve Bank of San Francisco. In response to the COVID-19 pandemic, the Federal Reserve reduced the reserve requirement ratios to zero percent effective March 26, 2020.

Commitments and Contingencies_4

Commitments and Contingencies - Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Operating leases:
Operating lease right-of-use assets	$ 24,559	$ 25,612
Operating lease liabilities	25,993	27,062
Finance leases:
Finance lease right-of-use assets	$ 62	$ 365
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Bank premises and equipment, net	Bank premises and equipment, net
Accumulated amortization	$ (31)	$ (307)
Finance lease right-of-use assets, net	31	58
Finance lease liabilities	$ 30	$ 58

Commitments and Contingencies_5

Commitments and Contingencies - Noncash Investing and Financing Activities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Right-of-use assets obtained in exchange for operating lease liabilities	$ 0	$ 12,178
Right-of-use assets obtained in exchange for finance lease liabilities	$ 0	$ 18

Commitments and Contingencies_6

Commitments and Contingencies - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 1,164	$ 1,055
Variable lease cost	0	2
Total operating lease cost	1,164	1,057
Finance lease cost:
Amortization of right-of-use assets	27	44
Interest on finance lease liabilities	0	1
Total finance lease cost	27	45
Total lease cost	$ 1,191	$ 1,102

Commitments and Contingencies_7

Commitments and Contingencies - Lease Liability Maturity Schedule (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Operating Leases
2021	$ 3,431
2022	4,424
2023	4,004
2024	3,300
2025	2,876
Thereafter	9,867
Total minimum lease payments	27,902
Amounts representing interest (present value discount)	(1,909)
Present value of net minimum lease payments (lease liability)	$ 25,993	$ 27,062
Weighted average remaining term (in years)	7 years 7 months 6 days
Weighted average discount rate	1.79%
Finance Lease, Liability, Payment, Due [Abstract]
2021	$ 13
2022	14
2023	4
2024	0
2025	0
Thereafter	0
Total minimum lease payments	31
Amounts representing interest (present value discount)	(1)
Present value of net minimum lease payments (lease liability)	$ 30	$ 58
Weighted average remaining term (in years)	2 years
Weighted average discount rate	1.93%

Derivative Financial Instrume_3

Derivative Financial Instruments and Hedging Activities - Narrative (Details) - Fair value hedge - Designated as hedging instrument $ in Thousands	Mar. 31, 2021USD ($)derivative	Dec. 31, 2020USD ($)
Derivatives, Fair Value [Line Items]
Interest rate swaps accrued interest | $	$ 11	$ 11
Interest rate swap
Derivatives, Fair Value [Line Items]
Number of instruments held | derivative	4

Derivative Financial Instrume_4

Derivative Financial Instruments and Hedging Activities - Information on Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Carrying Amounts of Hedged Assets	$ 14,793		$ 15,745
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Loans	1,039		1,753
Interest and fees on loans	20,661	$ 20,887
Fair value hedge | Interest income
Derivatives, Fair Value [Line Items]
Increase (decrease) in fair value of designated interest rate swaps due to LIBOR interest rate movements	719	(1,440)
Payment on interest rate swaps	(93)	(67)
(Decrease) increase in value of hedged loans	(714)	1,470
Decrease in value of yield maintenance agreement	(3)	(3)
Net losses on fair value hedging relationships recognized in interest income	(91)	$ (40)
Fair value hedge | Designated as hedging instrument | Interest rate swap | Asset Derivatives
Derivatives, Fair Value [Line Items]
Interest rate contracts notional amount, asset derivatives	0		0
Interest rate contracts fair value, asset derivatives	0		0
Fair value hedge | Designated as hedging instrument | Interest rate swap | Liability Derivatives
Derivatives, Fair Value [Line Items]
Interest rate contracts notional amount, liability derivatives	13,754		13,991
Interest rate contracts fair value, liability derivatives	$ 1,193		$ 1,912

Derivative Financial Instrume_5

Derivative Financial Instruments and Hedging Activities - Offsetting of Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross amounts of recognized assets	$ 0	$ 0
Gross amounts offset in the statements of condition	0	0
Net amounts of assets presented in the statements of condition	0	0
Gross amounts not offset in the statements of condition, financial instruments	0	0
Gross amounts not offset in the statements of condition, cash collateral received	0	0
Net Amount	$ 0	$ 0

Derivative Financial Instrume_6

Derivative Financial Instruments and Hedging Activities - Offsetting of Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross amounts of recognized liabilities	$ 1,193	$ 1,912
Gross amounts offset in the statements of condition	0	0
Net amounts of liabilities presented in the statements of condition	1,193	1,912
Gross amounts not offset in the statements of condition, financial instruments	0	0
Gross amounts not offset in the statements of condition, cash collateral pledged	(1,193)	(1,912)
Net Amount	$ 0	$ 0

Merger Agreement - Narrative (D

Merger Agreement - Narrative (Details) $ in Thousands	Apr. 16, 2021branchshares	Mar. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Subsequent Event [Line Items]
Assets		$ 3,058,133	$ 2,911,926
Deposits		2,656,199	2,504,249
Loans, at amortized cost		2,121,772	$ 2,088,556
American River Bank (ARB) | American River Bank (ARB) Merger
Subsequent Event [Line Items]
Assets		916,100
Deposits		788,600
Loans, at amortized cost		$ 475,400
Subsequent event | American River Bank (ARB) | American River Bank (ARB) Merger
Subsequent Event [Line Items]
Number of branches | branch	10
Subsequent event | Bank of Marin | American River Bank (ARB) Merger
Subsequent Event [Line Items]
Merger agreement, shares exchange ratio (in shares) | shares	0.575