Allowance for Loan Losses and Reserve for Unfunded Loan Commitments - Allowance for Credit Losses on Basis of Impairment Method (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 22,168	$ 22,302	$ 22,965	$ 23,105
Total loans	1,701,384	1,649,448
SBA including PPP loans held for investment
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	4	4
Collectively evaluated for impairment	937	1,070
Total	941	1,074
Individually evaluated for impairment	537	510
Collectively evaluated for impairment	61,129	82,015
Total loans	61,666	82,525
Commercial loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	2,349	2,615
Collectively evaluated for impairment	12,356	12,438
Total	14,705	15,053	14,727	14,992
Individually evaluated for impairment	4,772	4,220
Collectively evaluated for impairment	975,139	927,506
Total loans	979,911	931,726
Residential mortgage loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	224	80
Collectively evaluated for impairment	4,060	4,034
Total	4,284	4,114	5,009	5,318
Individually evaluated for impairment	3,146	3,262
Collectively evaluated for impairment	424,019	406,093
Total loans	427,165	409,355
Consumer loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	56	56
Collectively evaluated for impairment	586	615
Total	642	671	549	681
Individually evaluated for impairment	627	637
Collectively evaluated for impairment	77,075	77,307
Total loans	77,702	77,944
Residential construction loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	219	68
Collectively evaluated for impairment	1,377	1,322
Total	1,596	1,390	$ 1,026	$ 813
Individually evaluated for impairment	3,273	3,122
Collectively evaluated for impairment	126,385	117,403
Total loans	129,658	120,525
Total
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	2,852	2,823
Collectively evaluated for impairment	19,316	19,479
Total	22,168	22,302
Individually evaluated for impairment	12,355	11,751
Collectively evaluated for impairment	1,663,747	1,610,324
Total loans	$ 1,676,102	$ 1,622,075

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

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-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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