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Loans - Past-due Status of Loans by Class (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019 | Jun. 30, 2019
--- | --- | --- | ---
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | $ 9,557 | $ 15,017 | $ 12,274
Current | 1,442,066 | 1,282,058 | 1,236,858
Loans | 1,451,623 | 1,297,075 | 1,249,132
90 Days or More & Accruing | 1,468 | 1,560 | 672
30-59 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 1,618 | 6,139 | 4,399
60-89 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 1,751 | 2,092 | 2,529
90 Days or More Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 6,188 | 6,786 | 5,346
Commercial | Real estate |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 1,258 | 1,774 | 1,068
Current | 395,897 | 371,036 | 358,513
Loans | 397,155 | 372,810 | 359,581
90 Days or More & Accruing | 0 | 0 | 0
Commercial | Real estate | 30-59 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 134 | 786 | 240
Commercial | Real estate | 60-89 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 76 | 377 | 0
Commercial | Real estate | 90 Days or More Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 1,048 | 611 | 828
Commercial | Construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 271 | 15
Current | 47,169 | 37,813 | 32,770
Loans | 47,169 | 38,084 | 32,785
90 Days or More & Accruing | 0 | 0 | 0
Commercial | Construction | 30-59 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 15
Commercial | Construction | 60-89 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 14 | 0
Commercial | Construction | 90 Days or More Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 257 | 0
Commercial | Other |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 1,924 | 5,028 | 2,295
Current | 326,043 | 213,745 | 203,615
Loans | 327,967 | 218,773 | 205,910
90 Days or More & Accruing | 1,464 | 1,464 | 0
Commercial | Other | 30-59 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 172 | 2,764 | 2,031
Commercial | Other | 60-89 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 11 | 465 | 0
Commercial | Other | 90 Days or More Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 1,741 | 1,799 | 264
Municipal |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
Current | 49,644 | 41,288 | 36,113
Loans | 49,644 | 41,288 | 36,113
90 Days or More & Accruing | 0 | 0 | 0
Municipal | 30-59 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
Municipal | 60-89 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
Municipal | 90 Days or More Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
Residential | Construction |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
Current | 14,707 | 14,813 | 13,239
Loans | 14,707 | 14,813 | 13,239
90 Days or More & Accruing | 0 | 0 | 0
Residential | Construction | 30-59 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
Residential | Construction | 60-89 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
Residential | Construction | 90 Days or More Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 0 | 0 | 0
Residential | Term |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 3,533 | 4,640 | 7,279
Current | 496,160 | 487,815 | 474,070
Loans | 499,693 | 492,455 | 481,349
90 Days or More & Accruing | 0 | 86 | 664
Residential | Term | 30-59 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 270 | 1,129 | 1,079
Residential | Term | 60-89 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 1,413 | 1,132 | 2,302
Residential | Term | 90 Days or More Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 1,850 | 2,379 | 3,898
Home equity line of credit |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 2,581 | 2,957 | 1,242
Current | 84,438 | 89,392 | 93,521
Loans | 87,019 | 92,349 | 94,763
90 Days or More & Accruing | 0 | 0 | 0
Home equity line of credit | 30-59 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 896 | 1,169 | 698
Home equity line of credit | 60-89 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 145 | 58 | 197
Home equity line of credit | 90 Days or More Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 1,540 | 1,730 | 347
Consumer |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 261 | 347 | 375
Current | 28,008 | 26,156 | 25,017
Loans | 28,269 | 26,503 | 25,392
90 Days or More & Accruing | 4 | 10 | 8
Consumer | 30-59 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 146 | 291 | 336
Consumer | 60-89 Days Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | 106 | 46 | 30
Consumer | 90 Days or More Past Due |  |  |
Schedule of Financing Receivables [Line Items] |  |  |
All Past Due | $ 9 | $ 10 | $ 9

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