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Allowance for Loan Losses - Risk Ratings by Segment (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | $ 870,332 | $ 827,484 | $ 708,099
1 Strong |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 1,732 | 2,421 | 4,587
2 Above Average |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 60,042 | 56,546 | 57,337
3 Satisfactory |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 204,334 | 199,165 | 126,405
4 Average |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 447,239 | 414,786 | 363,753
5 Watch |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 138,860 | 137,026 | 129,677
6 OAEM |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 2,326 | 2,988 | 4,658
7 Substandard |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 15,799 | 14,552 | 21,682
8 Doubtful |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 0 | 0 | 0
Commercial | Real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 469,974 | 442,121 | 382,753
Commercial | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 53,394 | 56,565 | 43,913
Commercial | Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 297,488 | 285,015 | 237,896
Commercial | 1 Strong | Real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 0 | 0 | 0
Commercial | 1 Strong | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 0 | 0 | 0
Commercial | 1 Strong | Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 1,716 | 2,402 | 4,559
Commercial | 2 Above Average | Real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 7,663 | 5,938 | 10,222
Commercial | 2 Above Average | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 187 | 2,343 | 842
Commercial | 2 Above Average | Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 4,560 | 6,326 | 5,933
Commercial | 3 Satisfactory | Real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 94,014 | 91,475 | 83,905
Commercial | 3 Satisfactory | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 2,837 | 2,889 | 1,873
Commercial | 3 Satisfactory | Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 107,116 | 104,432 | 40,255
Commercial | 4 Average | Real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 279,879 | 261,539 | 203,263
Commercial | 4 Average | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 37,779 | 31,221 | 26,029
Commercial | 4 Average | Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 128,120 | 120,570 | 131,664
Commercial | 5 Watch | Real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 77,299 | 72,840 | 68,618
Commercial | 5 Watch | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 12,375 | 19,893 | 14,702
Commercial | 5 Watch | Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 49,186 | 44,293 | 46,357
Commercial | 6 OAEM | Real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 2,261 | 2,754 | 1,834
Commercial | 6 OAEM | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 0 | 0 | 0
Commercial | 6 OAEM | Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 65 | 234 | 2,824
Commercial | 7 Substandard | Real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 8,858 | 7,575 | 14,911
Commercial | 7 Substandard | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 216 | 219 | 467
Commercial | 7 Substandard | Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 6,725 | 6,758 | 6,304
Commercial | 8 Doubtful | Real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 0 | 0 | 0
Commercial | 8 Doubtful | Construction |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 0 | 0 | 0
Commercial | 8 Doubtful | Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 0 | 0 | 0
Municipal |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 49,476 | 43,783 | 43,537
Municipal | 1 Strong |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 16 | 19 | 28
Municipal | 2 Above Average |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 47,632 | 41,939 | 40,340
Municipal | 3 Satisfactory |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 367 | 369 | 372
Municipal | 4 Average |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 1,461 | 1,456 | 2,797
Municipal | 5 Watch |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 0 | 0 | 0
Municipal | 6 OAEM |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 0 | 0 | 0
Municipal | 7 Substandard |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | 0 | 0 | 0
Municipal | 8 Doubtful |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Risk rated loans receivable | $ 0 | $ 0 | $ 0

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