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Loans - Past-due Status of Loans by Class (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Schedule of Financing Receivables [Line Items]
Loans	$ 1,707,348	$ 1,647,649	$ 1,516,772
90+ Days & Accruing	46	32	85
30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	2,285	1,548	3,054
60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	68	543	206
90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	1,885	2,254	2,362
All Past Due
Schedule of Financing Receivables [Line Items]
Loans	4,238	4,345	5,622
Current
Schedule of Financing Receivables [Line Items]
Loans	1,703,110	1,643,304	1,511,150
Commercial |    Real estate
Schedule of Financing Receivables [Line Items]
Loans	588,301	576,198	469,974
90+ Days & Accruing	0	0	0
Commercial |    Real estate | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	8	249	186
Commercial |    Real estate | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	0	0
Commercial |    Real estate | 90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	555	191	283
Commercial |    Real estate | All Past Due
Schedule of Financing Receivables [Line Items]
Loans	563	440	469
Commercial |    Real estate | Current
Schedule of Financing Receivables [Line Items]
Loans	587,738	575,758	469,505
Commercial |    Construction
Schedule of Financing Receivables [Line Items]
Loans	102,982	79,365	53,394
90+ Days & Accruing	0	0	0
Commercial |    Construction | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	12	12	47
Commercial |    Construction | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	0	0
Commercial |    Construction | 90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	12	80
Commercial |    Construction | All Past Due
Schedule of Financing Receivables [Line Items]
Loans	12	24	127
Commercial |    Construction | Current
Schedule of Financing Receivables [Line Items]
Loans	102,970	79,341	53,267
Commercial |    Other
Schedule of Financing Receivables [Line Items]
Loans	267,666	264,570	297,488
90+ Days & Accruing	0	0	9
Commercial |    Other | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	165	30	696
Commercial |    Other | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	23	11
Commercial |    Other | 90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	104	104	628
Commercial |    Other | All Past Due
Schedule of Financing Receivables [Line Items]
Loans	269	157	1,335
Commercial |    Other | Current
Schedule of Financing Receivables [Line Items]
Loans	267,397	264,413	296,153
Municipal
Schedule of Financing Receivables [Line Items]
Loans	50,867	48,362	49,476
90+ Days & Accruing	0	0	0
Municipal | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	0	0
Municipal | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	0	0
Municipal | 90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	0	0
Municipal | All Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	0	0
Municipal | Current
Schedule of Financing Receivables [Line Items]
Loans	50,867	48,362	49,476
Residential |    Construction
Schedule of Financing Receivables [Line Items]
Loans	36,272	31,763	24,796
90+ Days & Accruing	0	0	0
Residential |    Construction | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	0	111
Residential |    Construction | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	0	0
Residential |    Construction | 90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	0	0
Residential |    Construction | All Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	0	111
Residential |    Construction | Current
Schedule of Financing Receivables [Line Items]
Loans	36,272	31,763	24,685
Residential |    Term
Schedule of Financing Receivables [Line Items]
Loans	566,320	550,783	520,317
90+ Days & Accruing	26	0	71
Residential |    Term | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	1,394	348	1,183
Residential |    Term | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	169	148
Residential |    Term | 90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	1,037	1,780	958
Residential |    Term | All Past Due
Schedule of Financing Receivables [Line Items]
Loans	2,431	2,297	2,289
Residential |    Term | Current
Schedule of Financing Receivables [Line Items]
Loans	563,889	548,486	518,028
Home equity line of credit
Schedule of Financing Receivables [Line Items]
Loans	72,863	73,632	77,210
90+ Days & Accruing	0	0	0
Home equity line of credit | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	653	741	547
Home equity line of credit | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	159	45
Home equity line of credit | 90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	174	135	408
Home equity line of credit | All Past Due
Schedule of Financing Receivables [Line Items]
Loans	827	1,035	1,000
Home equity line of credit | Current
Schedule of Financing Receivables [Line Items]
Loans	72,036	72,597	76,210
Consumer
Schedule of Financing Receivables [Line Items]
Loans	22,077	22,976	24,117
90+ Days & Accruing	20	32	5
Consumer | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	53	168	284
Consumer | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	68	192	2
Consumer | 90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	15	32	5
Consumer | All Past Due
Schedule of Financing Receivables [Line Items]
Loans	136	392	291
Consumer | Current
Schedule of Financing Receivables [Line Items]
Loans	$ 21,941	$ 22,584	$ 23,826

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