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Loans - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	$ 5,049	$ 5,602	$ 6,941
Commercial |    Real estate
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	604	242	748
Commercial |    Construction
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	27	27	89
Commercial |    Other
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	1,014	1,068	1,675
Municipal
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	0	0	0
Residential |    Construction
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	0	0	0
Residential |    Term
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	3,113	3,808	3,577
Home equity line of credit
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	291	457	852
Consumer
Schedule of Financing Receivables [Line Items]
Nonaccrual loans	$ 0	$ 0	$ 0

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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