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Allowance for Loan Losses - Risk Ratings by Segment (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | $ 827,484 | $ 670,955
Commercial | Real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 442,121 | 372,810
Commercial | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 56,565 | 38,084
Commercial | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 285,015 | 218,773
Municipal |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 43,783 | 41,288
1 Strong |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 2,421 | 4,290
1 Strong | Commercial | Real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 0 | 0
1 Strong | Commercial | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 0 | 0
1 Strong | Commercial | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 2,402 | 4,258
1 Strong | Municipal |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 19 | 32
2 Above average |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 56,546 | 57,664
2 Above average | Commercial | Real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 5,938 | 12,393
2 Above average | Commercial | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 2,343 | 794
2 Above average | Commercial | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 6,326 | 6,187
2 Above average | Municipal |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 41,939 | 38,290
3 Satisfactory |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 199,165 | 118,920
3 Satisfactory | Commercial | Real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 91,475 | 74,709
3 Satisfactory | Commercial | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 2,889 | 2,305
3 Satisfactory | Commercial | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 104,432 | 41,527
3 Satisfactory | Municipal |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 369 | 379
4 Average |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 414,786 | 334,503
4 Average | Commercial | Real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 261,539 | 205,510
4 Average | Commercial | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 31,221 | 19,017
4 Average | Commercial | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 120,570 | 107,389
4 Average | Municipal |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 1,456 | 2,587
5 Watch |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 137,026 | 126,222
5 Watch | Commercial | Real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 72,840 | 63,582
5 Watch | Commercial | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 19,893 | 15,488
5 Watch | Commercial | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 44,293 | 47,152
5 Watch | Municipal |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 0 | 0
6 OAEM |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 2,988 | 3,148
6 OAEM | Commercial | Real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 2,754 | 1,160
6 OAEM | Commercial | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 0 | 0
6 OAEM | Commercial | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 234 | 1,988
6 OAEM | Municipal |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 0 | 0
8 Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 14,552 | 26,208
8 Doubtful | Commercial | Real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 7,575 | 15,456
8 Doubtful | Commercial | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 219 | 480
8 Doubtful | Commercial | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 6,758 | 10,272
8 Doubtful | Municipal |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 0 | 0
8 Doubtful |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 0 | 0
8 Doubtful | Commercial | Real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 0 | 0
8 Doubtful | Commercial | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 0 | 0
8 Doubtful | Commercial | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | 0 | 0
8 Doubtful | Municipal |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Risk rated loans receivable | $ 0 | $ 0

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