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Loans - Past-due Status of Loans by Class (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Schedule of Financing Receivables [Line Items]
Loans	$ 1,588,264	$ 1,476,761	$ 1,451,623
90+ Days & Accruing	104	1,505	1,468
30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	467	2,916	1,618
60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	877	2,417	1,751
90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	2,076	4,389	6,188
All Past Due
Schedule of Financing Receivables [Line Items]
Loans	3,420	9,722	9,557
Current
Schedule of Financing Receivables [Line Items]
Loans	1,584,844	1,467,039	1,442,066
Commercial |    Real estate
Schedule of Financing Receivables [Line Items]
Loans	527,415	442,121	397,155
90+ Days & Accruing	0	0	0
Commercial |    Real estate | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	75	139	134
Commercial |    Real estate | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	190	76
Commercial |    Real estate | 90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	191	226	1,048
Commercial |    Real estate | All Past Due
Schedule of Financing Receivables [Line Items]
Loans	266	555	1,258
Commercial |    Real estate | Current
Schedule of Financing Receivables [Line Items]
Loans	527,149	441,566	395,897
Commercial |    Construction
Schedule of Financing Receivables [Line Items]
Loans	65,794	56,565	47,169
90+ Days & Accruing	0	0	0
Commercial |    Construction | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	13	13	0
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	16	80	0
Commercial |    Construction | All Past Due
Schedule of Financing Receivables [Line Items]
Loans	29	93	0
Commercial |    Construction | Current
Schedule of Financing Receivables [Line Items]
Loans	65,765	56,472	47,169
Commercial |    Other
Schedule of Financing Receivables [Line Items]
Loans	298,747	285,015	327,967
90+ Days & Accruing	0	1,464	1,464
Commercial |    Other | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	62	490	172
Commercial |    Other | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	62	11
Commercial |    Other | 90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	821	2,082	1,741
Commercial |    Other | All Past Due
Schedule of Financing Receivables [Line Items]
Loans	883	2,634	1,924
Commercial |    Other | Current
Schedule of Financing Receivables [Line Items]
Loans	297,864	282,381	326,043
Municipal
Schedule of Financing Receivables [Line Items]
Loans	41,079	43,783	49,644
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	41,079	43,783	49,644
Residential |    Construction
Schedule of Financing Receivables [Line Items]
Loans	29,818	21,600	14,707
90+ Days & Accruing	0	0	0
Residential |    Construction | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	0	0
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	0
Residential |    Construction | Current
Schedule of Financing Receivables [Line Items]
Loans	29,818	21,600	14,707
Residential |    Term
Schedule of Financing Receivables [Line Items]
Loans	523,344	522,070	499,693
90+ Days & Accruing	0	23	0
Residential |    Term | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	134	540	270
Residential |    Term | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	773	1,799	1,413
Residential |    Term | 90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	715	1,616	1,850
Residential |    Term | All Past Due
Schedule of Financing Receivables [Line Items]
Loans	1,622	3,955	3,533
Residential |    Term | Current
Schedule of Financing Receivables [Line Items]
Loans	521,722	518,115	496,160
Home equity line of credit
Schedule of Financing Receivables [Line Items]
Loans	77,709	79,750	87,019
90+ Days & Accruing	17	0	0
Home equity line of credit | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	43	1,645	896
Home equity line of credit | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	0	324	145
Home equity line of credit | 90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	246	367	1,540
Home equity line of credit | All Past Due
Schedule of Financing Receivables [Line Items]
Loans	289	2,336	2,581
Home equity line of credit | Current
Schedule of Financing Receivables [Line Items]
Loans	77,420	77,414	84,438
Consumer
Schedule of Financing Receivables [Line Items]
Loans	24,358	25,857	28,269
90+ Days & Accruing	87	18	4
Consumer | 30-59 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	140	89	146
Consumer | 60-89 Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	104	42	106
Consumer | 90+ Days Past Due
Schedule of Financing Receivables [Line Items]
Loans	87	18	9
Consumer | All Past Due
Schedule of Financing Receivables [Line Items]
Loans	331	149	261
Consumer | Current
Schedule of Financing Receivables [Line Items]
Loans	$ 24,027	$ 25,708	$ 28,008

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