Allowance for Loan Losses and Reserve for Unfunded Loan Commitments - Allowance for Credit Losses on Basis of Impairment Method (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 22,302	$ 23,105	$ 16,395	$ 15,488
Total loans	1,649,448	1,627,817
SBA including PPP loans held for investment
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	4	324
Collectively evaluated for impairment	1,070	977
Total	1,074	1,301
Individually evaluated for impairment	510	2,102
Collectively evaluated for impairment	82,015	155,742
Total loans	82,525	157,844
Commercial loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	2,615	3,682
Collectively evaluated for impairment	12,438	11,310
Total	15,053	14,992	9,722	8,705
Individually evaluated for impairment	4,220	5,702
Collectively evaluated for impairment	927,506	834,086
Total loans	931,726	839,788
Residential mortgage loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	80	101
Collectively evaluated for impairment	4,034	5,217
Total	4,114	5,318	4,254	3,900
Individually evaluated for impairment	3,262	5,217
Collectively evaluated for impairment	406,093	462,369
Total loans	409,355	467,586
Consumer loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	56	0
Collectively evaluated for impairment	615	681
Total	671	681	625	618
Individually evaluated for impairment	637	1,295
Collectively evaluated for impairment	77,307	64,805
Total loans	77,944	66,100
Residential construction loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	68	0
Collectively evaluated for impairment	1,322	813
Total	1,390	813	$ 715	$ 610
Individually evaluated for impairment	3,122	1,750
Collectively evaluated for impairment	117,403	85,414
Total loans	120,525	87,164
Total
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	2,823	4,107
Collectively evaluated for impairment	19,479	18,998
Total	22,302	23,105
Individually evaluated for impairment	11,751	16,066
Collectively evaluated for impairment	1,610,324	1,602,416
Total loans	$ 1,622,075	$ 1,618,482

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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