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Loans, Allowance for Credit Losses and Credit Quality - Finance Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | $ 1,825,140 |  | $ 2,347,498 |  | $ 1,825,140 |  | $ 2,347,498 |  |
2021 |  | 2,677,047 |  | 2,617,135 |  | 2,677,047 |  | 2,617,135 |  |
2020 |  | 2,247,195 |  | 1,958,359 |  | 2,247,195 |  | 1,958,359 |  |
2019 |  | 1,690,252 |  | 1,065,396 |  | 1,690,252 |  | 1,065,396 |  |
2018 |  | 841,526 |  | 1,069,133 |  | 841,526 |  | 1,069,133 |  |
Prior |  | 3,214,966 |  | 2,968,288 |  | 3,214,966 |  | 2,968,288 |  |
Revolving Loans |  | 1,722,920 |  | 1,666,287 |  | 1,722,920 |  | 1,666,287 |  |
Revolving converted to Term |  | 5,189 |  | 8,254 |  | 5,189 |  | 8,254 |  |
Total loans |  | 14,224,235 | [1] |  |  | 14,224,235 | [1] |  |  | $ 13,928,675
Total loans |  | 14,224,235 |  | 13,700,350 |  | 14,224,235 |  | 13,700,350 |  | 13,928,675
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2023 |  |  |  |  |  | 1,836 |  |  |  |
2022 |  |  |  |  |  | 5,072 |  |  |  |
2021 |  |  |  |  |  | 22 |  |  |  |
2020 |  |  |  |  |  | 37 |  |  |  |
2019 |  |  |  |  |  | 0 |  |  |  |
Prior |  |  |  |  |  | 41 |  |  |  |
Revolving Loans |  |  |  |  |  | 23,592 |  |  |  |
Revolving converted to Term |  |  |  |  |  | 0 |  |  |  |
Total |  | 6,018 |  | 741 |  | 30,600 |  | 1,992 |  |
Commercial And Industrial [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 312,282 |  | 296,626 |  | 312,282 |  | 296,626 |  |
2021 |  | 195,683 |  | 151,496 |  | 195,683 |  | 151,496 |  |
2020 |  | 96,402 |  | 123,790 |  | 96,402 |  | 123,790 |  |
2019 |  | 83,776 |  | 69,474 |  | 83,776 |  | 69,474 |  |
2018 |  | 46,996 |  | 86,866 |  | 46,996 |  | 86,866 |  |
Prior |  | 116,990 |  | 23,769 |  | 116,990 |  | 23,769 |  |
Revolving Loans |  | 800,874 |  | 792,966 |  | 800,874 |  | 792,966 |  |
Revolving converted to Term |  | 0 |  | 3,362 |  | 0 |  | 3,362 |  |
Total loans |  | 1,653,003 | [1] |  |  | 1,653,003 | [1] |  |  | 1,635,103
Total loans |  | 1,653,003 |  | 1,548,349 | [1] | 1,653,003 |  | 1,548,349 | [1] | 1,635,103
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2023 |  |  |  |  |  | 0 |  |  |  |
2022 |  |  |  |  |  | 0 |  |  |  |
2021 |  |  |  |  |  | 0 |  |  |  |
2020 |  |  |  |  |  | 0 |  |  |  |
2019 |  |  |  |  |  | 0 |  |  |  |
Prior |  |  |  |  |  | 34 |  |  |  |
Revolving Loans |  |  |  |  |  | 23,437 |  |  |  |
Revolving converted to Term |  |  |  |  |  | 0 |  |  |  |
Total |  | 0 |  | 0 |  | 23,471 |  | 0 |  |
Commercial And Industrial [Member] | Pass [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 | [2] | 303,838 |  | 292,601 |  | 303,838 |  | 292,601 |  |
2021 | [2] | 188,559 |  | 149,588 |  | 188,559 |  | 149,588 |  |
2020 | [2] | 94,714 |  | 122,752 |  | 94,714 |  | 122,752 |  |
2019 | [2] | 73,366 |  | 67,591 |  | 73,366 |  | 67,591 |  |
2018 | [2] | 45,741 |  | 82,911 |  | 45,741 |  | 82,911 |  |
Prior | [2] | 116,052 |  | 22,943 |  | 116,052 |  | 22,943 |  |
Revolving Loans | [2] | 737,335 |  | 759,390 |  | 737,335 |  | 759,390 |  |
Revolving converted to Term | [2] | 0 |  | 3,362 |  | 0 |  | 3,362 |  |
Total loans | [1],[2] | 1,559,605 |  |  |  | 1,559,605 |  |  |  |
Total loans | [1],[2] |  |  | 1,501,138 |  |  |  | 1,501,138 |  |
Commercial And Industrial [Member] | Potential Weakness [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 6,511 |  | 1,540 |  | 6,511 |  | 1,540 |  |
2021 |  | 2,417 |  | 973 |  | 2,417 |  | 973 |  |
2020 |  | 614 |  | 1,038 |  | 614 |  | 1,038 |  |
2019 |  | 10,278 |  | 1,844 |  | 10,278 |  | 1,844 |  |
2018 |  | 90 |  | 3,955 |  | 90 |  | 3,955 |  |
Prior |  | 132 |  | 715 |  | 132 |  | 715 |  |
Revolving Loans |  | 46,706 |  | 6,557 |  | 46,706 |  | 6,557 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 66,748 |  |  |  | 66,748 |  |  |  |
Total loans | [1] |  |  | 16,622 |  |  |  | 16,622 |  |
Commercial And Industrial [Member] | Definite Weakness Loss Unlikely [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 1,933 |  | 2,485 |  | 1,933 |  | 2,485 |  |
2021 |  | 4,707 |  | 935 |  | 4,707 |  | 935 |  |
2020 |  | 1,074 |  | 0 |  | 1,074 |  | 0 |  |
2019 |  | 132 |  | 39 |  | 132 |  | 39 |  |
2018 |  | 1,165 |  | 0 |  | 1,165 |  | 0 |  |
Prior |  | 806 |  | 111 |  | 806 |  | 111 |  |
Revolving Loans |  | 16,833 |  | 27,019 |  | 16,833 |  | 27,019 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 26,650 |  |  |  | 26,650 |  |  |  |
Total loans | [1] |  |  | 30,589 |  |  |  | 30,589 |  |
Commercial And Industrial [Member] | Partial Loss Probable [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2021 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2020 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2019 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2018 |  | 0 |  | 0 |  | 0 |  | 0 |  |
Prior |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 0 |  |  |  | 0 |  |  |  |
Total loans | [1] |  |  | 0 |  |  |  | 0 |  |
Commercial And Industrial [Member] | Definite Loss [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2021 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2020 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2019 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2018 |  | 0 |  | 0 |  | 0 |  | 0 |  |
Prior |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 0 |  |  |  | 0 |  |  |  |
Total loans | [1] |  |  | 0 |  |  |  | 0 |  |
Commercial Real Estate [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 889,069 |  | 982,035 |  | 889,069 |  | 982,035 |  |
2021 |  | 1,225,696 |  | 1,522,690 |  | 1,225,696 |  | 1,522,690 |  |
2020 |  | 1,420,347 |  | 1,311,597 |  | 1,420,347 |  | 1,311,597 |  |
2019 |  | 1,331,223 |  | 789,834 |  | 1,331,223 |  | 789,834 |  |
2018 |  | 632,165 |  | 819,847 |  | 632,165 |  | 819,847 |  |
Prior |  | 2,328,376 |  | 2,203,527 |  | 2,328,376 |  | 2,203,527 |  |
Revolving Loans |  | 68,496 |  | 47,317 |  | 68,496 |  | 47,317 |  |
Revolving converted to Term |  | 858 |  | 1,070 |  | 858 |  | 1,070 |  |
Total loans |  | 7,896,230 | [1] |  |  | 7,896,230 | [1] |  |  | 7,760,230
Total loans |  | 7,896,230 |  | 7,677,917 | [1] | 7,896,230 |  | 7,677,917 | [1] | 7,760,230
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2023 |  |  |  |  |  | 0 |  |  |  |
2022 |  |  |  |  |  | 5,072 |  |  |  |
2021 |  |  |  |  |  | 0 |  |  |  |
2020 |  |  |  |  |  | 0 |  |  |  |
2019 |  |  |  |  |  | 0 |  |  |  |
Prior |  |  |  |  |  | 0 |  |  |  |
Revolving Loans |  |  |  |  |  | 0 |  |  |  |
Revolving converted to Term |  |  |  |  |  | 0 |  |  |  |
Total |  | 5,072 |  | 62 |  | 5,072 |  | 62 |  |
Commercial Real Estate [Member] | Pass [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 795,830 |  | 922,772 |  | 795,830 |  | 922,772 |  |
2021 |  | 1,160,497 |  | 1,467,370 |  | 1,160,497 |  | 1,467,370 |  |
2020 |  | 1,338,792 |  | 1,265,711 |  | 1,338,792 |  | 1,265,711 |  |
2019 |  | 1,312,240 |  | 773,102 |  | 1,312,240 |  | 773,102 |  |
2018 |  | 610,009 |  | 733,621 |  | 610,009 |  | 733,621 |  |
Prior |  | 2,188,221 |  | 1,976,282 |  | 2,188,221 |  | 1,976,282 |  |
Revolving Loans |  | 68,496 |  | 47,317 |  | 68,496 |  | 47,317 |  |
Revolving converted to Term |  | 858 |  | 1,070 |  | 858 |  | 1,070 |  |
Total loans | [1] | 7,474,943 |  |  |  | 7,474,943 |  |  |  |
Total loans | [1] |  |  | 7,187,245 |  |  |  | 7,187,245 |  |
Commercial Real Estate [Member] | Potential Weakness [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 62,572 |  | 32,579 |  | 62,572 |  | 32,579 |  |
2021 |  | 37,695 |  | 53,096 |  | 37,695 |  | 53,096 |  |
2020 |  | 57,987 |  | 41,164 |  | 57,987 |  | 41,164 |  |
2019 |  | 14,662 |  | 14,147 |  | 14,662 |  | 14,147 |  |
2018 |  | 2,945 |  | 68,298 |  | 2,945 |  | 68,298 |  |
Prior |  | 118,830 |  | 205,234 |  | 118,830 |  | 205,234 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 294,691 |  |  |  | 294,691 |  |  |  |
Total loans | [1] |  |  | 414,518 |  |  |  | 414,518 |  |
Commercial Real Estate [Member] | Definite Weakness Loss Unlikely [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 30,667 |  | 26,684 |  | 30,667 |  | 26,684 |  |
2021 |  | 27,504 |  | 2,224 |  | 27,504 |  | 2,224 |  |
2020 |  | 23,568 |  | 4,722 |  | 23,568 |  | 4,722 |  |
2019 |  | 4,321 |  | 2,585 |  | 4,321 |  | 2,585 |  |
2018 |  | 19,211 |  | 17,928 |  | 19,211 |  | 17,928 |  |
Prior |  | 21,325 |  | 21,836 |  | 21,325 |  | 21,836 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 126,596 |  |  |  | 126,596 |  |  |  |
Total loans | [1] |  |  | 75,979 |  |  |  | 75,979 |  |
Commercial Real Estate [Member] | Partial Loss Probable [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2021 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2020 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2019 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2018 |  | 0 |  | 0 |  | 0 |  | 0 |  |
Prior |  | 0 |  | 175 |  | 0 |  | 175 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 0 |  |  |  | 0 |  |  |  |
Total loans | [1] |  |  | 175 |  |  |  | 175 |  |
Commercial Real Estate [Member] | Definite Loss [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2021 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2020 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2019 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2018 |  | 0 |  | 0 |  | 0 |  | 0 |  |
Prior |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 0 |  |  |  | 0 |  |  |  |
Total loans | [1] |  |  | 0 |  |  |  | 0 |  |
Construction Loans [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 169,202 |  | 431,396 |  | 169,202 |  | 431,396 |  |
2021 |  | 517,297 |  | 405,074 |  | 517,297 |  | 405,074 |  |
2020 |  | 222,883 |  | 234,723 |  | 222,883 |  | 234,723 |  |
2019 |  | 9,939 |  | 57,768 |  | 9,939 |  | 57,768 |  |
2018 |  | 27,304 |  | 26,263 |  | 27,304 |  | 26,263 |  |
Prior |  | 1,569 |  | 7,844 |  | 1,569 |  | 7,844 |  |
Revolving Loans |  | 17,248 |  | 21,457 |  | 17,248 |  | 21,457 |  |
Revolving converted to Term |  | 0 |  | 632 |  | 0 |  | 632 |  |
Total loans |  | 965,442 | [1] |  |  | 965,442 | [1] |  |  | 1,154,413
Total loans |  | 965,442 |  | 1,185,157 | [1] | 965,442 |  | 1,185,157 | [1] | 1,154,413
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2023 |  |  |  |  |  | 0 |  |  |  |
2022 |  |  |  |  |  | 0 |  |  |  |
2021 |  |  |  |  |  | 0 |  |  |  |
2020 |  |  |  |  |  | 0 |  |  |  |
2019 |  |  |  |  |  | 0 |  |  |  |
Prior |  |  |  |  |  | 0 |  |  |  |
Revolving Loans |  |  |  |  |  | 0 |  |  |  |
Revolving converted to Term |  |  |  |  |  | 0 |  |  |  |
Total |  | 0 |  | 0 |  | 0 |  | 0 |  |
Construction Loans [Member] | Pass [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 146,278 |  | 388,627 |  | 146,278 |  | 388,627 |  |
2021 |  | 491,098 |  | 392,229 |  | 491,098 |  | 392,229 |  |
2020 |  | 201,730 |  | 231,336 |  | 201,730 |  | 231,336 |  |
2019 |  | 9,939 |  | 57,768 |  | 9,939 |  | 57,768 |  |
2018 |  | 27,304 |  | 26,263 |  | 27,304 |  | 26,263 |  |
Prior |  | 1,569 |  | 7,844 |  | 1,569 |  | 7,844 |  |
Revolving Loans |  | 17,248 |  | 21,457 |  | 17,248 |  | 21,457 |  |
Revolving converted to Term |  | 0 |  | 632 |  | 0 |  | 632 |  |
Total loans | [1] | 895,166 |  |  |  | 895,166 |  |  |  |
Total loans | [1] |  |  | 1,126,156 |  |  |  | 1,126,156 |  |
Construction Loans [Member] | Potential Weakness [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 13,484 |  | 40,631 |  | 13,484 |  | 40,631 |  |
2021 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2020 |  | 4,823 |  | 3,387 |  | 4,823 |  | 3,387 |  |
2019 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2018 |  | 0 |  | 0 |  | 0 |  | 0 |  |
Prior |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 18,307 |  |  |  | 18,307 |  |  |  |
Total loans | [1] |  |  | 44,018 |  |  |  | 44,018 |  |
Construction Loans [Member] | Definite Weakness Loss Unlikely [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 9,440 |  | 2,138 |  | 9,440 |  | 2,138 |  |
2021 |  | 26,199 |  | 12,845 |  | 26,199 |  | 12,845 |  |
2020 |  | 16,330 |  | 0 |  | 16,330 |  | 0 |  |
2019 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2018 |  | 0 |  | 0 |  | 0 |  | 0 |  |
Prior |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 51,969 |  |  |  | 51,969 |  |  |  |
Total loans | [1] |  |  | 14,983 |  |  |  | 14,983 |  |
Construction Loans [Member] | Partial Loss Probable [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2021 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2020 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2019 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2018 |  | 0 |  | 0 |  | 0 |  | 0 |  |
Prior |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 0 |  |  |  | 0 |  |  |  |
Total loans | [1] |  |  | 0 |  |  |  | 0 |  |
Construction Loans [Member] | Definite Loss [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2021 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2020 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2019 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2018 |  | 0 |  | 0 |  | 0 |  | 0 |  |
Prior |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 0 |  |  |  | 0 |  |  |  |
Total loans | [1] |  |  | 0 |  |  |  | 0 |  |
Small Business [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 40,980 |  | 42,117 |  | 40,980 |  | 42,117 |  |
2021 |  | 53,207 |  | 46,744 |  | 53,207 |  | 46,744 |  |
2020 |  | 40,832 |  | 32,804 |  | 40,832 |  | 32,804 |  |
2019 |  | 27,209 |  | 17,912 |  | 27,209 |  | 17,912 |  |
2018 |  | 13,759 |  | 10,667 |  | 13,759 |  | 10,667 |  |
Prior |  | 24,259 |  | 20,580 |  | 24,259 |  | 20,580 |  |
Revolving Loans |  | 45,089 |  | 38,743 |  | 45,089 |  | 38,743 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans |  | 245,335 | [1] |  |  | 245,335 | [1] |  |  | 219,102
Total loans |  | 245,335 |  | 209,567 | [1] | 245,335 |  | 209,567 | [1] | 219,102
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2023 |  |  |  |  |  | 0 |  |  |  |
2022 |  |  |  |  |  | 0 |  |  |  |
2021 |  |  |  |  |  | 22 |  |  |  |
2020 |  |  |  |  |  | 37 |  |  |  |
2019 |  |  |  |  |  | 0 |  |  |  |
Prior |  |  |  |  |  | 0 |  |  |  |
Revolving Loans |  |  |  |  |  | 140 |  |  |  |
Revolving converted to Term |  |  |  |  |  | 0 |  |  |  |
Total |  | 112 |  | 0 |  | 199 |  | 59 |  |
Small Business [Member] | Pass [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 40,551 |  | 41,923 |  | 40,551 |  | 41,923 |  |
2021 |  | 52,883 |  | 46,581 |  | 52,883 |  | 46,581 |  |
2020 |  | 40,706 |  | 31,968 |  | 40,706 |  | 31,968 |  |
2019 |  | 26,759 |  | 17,536 |  | 26,759 |  | 17,536 |  |
2018 |  | 13,759 |  | 10,454 |  | 13,759 |  | 10,454 |  |
Prior |  | 23,458 |  | 20,227 |  | 23,458 |  | 20,227 |  |
Revolving Loans |  | 43,759 |  | 37,455 |  | 43,759 |  | 37,455 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 241,875 |  |  |  | 241,875 |  |  |  |
Total loans | [1] |  |  | 206,144 |  |  |  | 206,144 |  |
Small Business [Member] | Potential Weakness [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2021 |  | 0 |  | 163 |  | 0 |  | 163 |  |
2020 |  | 0 |  | 394 |  | 0 |  | 394 |  |
2019 |  | 155 |  | 369 |  | 155 |  | 369 |  |
2018 |  | 0 |  | 193 |  | 0 |  | 193 |  |
Prior |  | 186 |  | 129 |  | 186 |  | 129 |  |
Revolving Loans |  | 295 |  | 697 |  | 295 |  | 697 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 636 |  |  |  | 636 |  |  |  |
Total loans | [1] |  |  | 1,945 |  |  |  | 1,945 |  |
Small Business [Member] | Definite Weakness Loss Unlikely [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 429 |  | 194 |  | 429 |  | 194 |  |
2021 |  | 324 |  | 0 |  | 324 |  | 0 |  |
2020 |  | 126 |  | 442 |  | 126 |  | 442 |  |
2019 |  | 295 |  | 7 |  | 295 |  | 7 |  |
2018 |  | 0 |  | 20 |  | 0 |  | 20 |  |
Prior |  | 615 |  | 224 |  | 615 |  | 224 |  |
Revolving Loans |  | 1,035 |  | 591 |  | 1,035 |  | 591 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 2,824 |  |  |  | 2,824 |  |  |  |
Total loans | [1] |  |  | 1,478 |  |  |  | 1,478 |  |
Small Business [Member] | Partial Loss Probable [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2021 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2020 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2019 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2018 |  | 0 |  | 0 |  | 0 |  | 0 |  |
Prior |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 0 |  |  |  | 0 |  |  |  |
Total loans | [1] |  |  | 0 |  |  |  | 0 |  |
Small Business [Member] | Definite Loss [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2021 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2020 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2019 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2018 |  | 0 |  | 0 |  | 0 |  | 0 |  |
Prior |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 0 |  |  |  | 0 |  |  |  |
Total loans | [1] |  |  | 0 |  |  |  | 0 |  |
Residential Real Estate [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 391,340 |  | 557,643 |  | 391,340 |  | 557,643 |  |
2021 |  | 645,593 |  | 426,721 |  | 645,593 |  | 426,721 |  |
2020 |  | 409,145 |  | 197,214 |  | 409,145 |  | 197,214 |  |
2019 |  | 186,469 |  | 96,155 |  | 186,469 |  | 96,155 |  |
2018 |  | 90,853 |  | 97,204 |  | 90,853 |  | 97,204 |  |
Prior |  | 614,702 |  | 584,317 |  | 614,702 |  | 584,317 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans |  | 2,338,102 | [1] |  |  | 2,338,102 | [1] |  |  | 2,035,524
Total loans |  | 2,338,102 |  | 1,959,254 | [1] | 2,338,102 |  | 1,959,254 | [1] | 2,035,524
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2023 |  |  |  |  |  | 0 |  |  |  |
2022 |  |  |  |  |  | 0 |  |  |  |
2021 |  |  |  |  |  | 0 |  |  |  |
2020 |  |  |  |  |  | 0 |  |  |  |
2019 |  |  |  |  |  | 0 |  |  |  |
Prior |  |  |  |  |  | 0 |  |  |  |
Revolving Loans |  |  |  |  |  | 0 |  |  |  |
Revolving converted to Term |  |  |  |  |  | 0 |  |  |  |
Total |  | 0 |  | 0 |  | 0 |  | 0 |  |
Residential Real Estate [Member] | Pass [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 391,121 |  | 557,643 |  | 391,121 |  | 557,643 |  |
2021 |  | 645,593 |  | 426,721 |  | 645,593 |  | 426,721 |  |
2020 |  | 408,752 |  | 196,538 |  | 408,752 |  | 196,538 |  |
2019 |  | 186,334 |  | 95,689 |  | 186,334 |  | 95,689 |  |
2018 |  | 89,911 |  | 96,828 |  | 89,911 |  | 96,828 |  |
Prior |  | 612,878 |  | 582,830 |  | 612,878 |  | 582,830 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 2,334,589 |  |  |  | 2,334,589 |  |  |  |
Total loans | [1] |  |  | 1,956,249 |  |  |  | 1,956,249 |  |
Residential Real Estate [Member] | Default [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 219 |  | 0 |  | 219 |  | 0 |  |
2021 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2020 |  | 393 |  | 676 |  | 393 |  | 676 |  |
2019 |  | 135 |  | 466 |  | 135 |  | 466 |  |
2018 |  | 942 |  | 376 |  | 942 |  | 376 |  |
Prior |  | 1,824 |  | 1,487 |  | 1,824 |  | 1,487 |  |
Revolving Loans |  | 0 |  | 0 |  | 0 |  | 0 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 3,513 |  |  |  | 3,513 |  |  |  |
Total loans | [1] |  |  | 3,005 |  |  |  | 3,005 |  |
Home Equity Loan [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 21,729 |  | 37,298 |  | 21,729 |  | 37,298 |  |
2021 |  | 39,251 |  | 61,898 |  | 39,251 |  | 61,898 |  |
2020 |  | 56,216 |  | 56,262 |  | 56,216 |  | 56,262 |  |
2019 |  | 50,724 |  | 32,883 |  | 50,724 |  | 32,883 |  |
2018 |  | 30,039 |  | 27,906 |  | 30,039 |  | 27,906 |  |
Prior |  | 126,897 |  | 124,610 |  | 126,897 |  | 124,610 |  |
Revolving Loans |  | 766,368 |  | 743,123 |  | 766,368 |  | 743,123 |  |
Revolving converted to Term |  | 4,331 |  | 3,190 |  | 4,331 |  | 3,190 |  |
Total loans | [1] | 1,095,555 |  |  |  | 1,095,555 |  |  |  |
Total loans |  | 1,095,555 |  | 1,087,170 | [1] | 1,095,555 |  | 1,087,170 | [1] | $ 1,088,750
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2023 |  |  |  |  |  | 0 |  |  |  |
2022 |  |  |  |  |  | 0 |  |  |  |
2021 |  |  |  |  |  | 0 |  |  |  |
2020 |  |  |  |  |  | 0 |  |  |  |
2019 |  |  |  |  |  | 0 |  |  |  |
Prior |  |  |  |  |  | 0 |  |  |  |
Revolving Loans |  |  |  |  |  | 0 |  |  |  |
Revolving converted to Term |  |  |  |  |  | 0 |  |  |  |
Total |  | 0 |  | 0 |  | 0 |  | 122 |  |
Home Equity Loan [Member] | Pass [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 21,729 |  | 37,298 |  | 21,729 |  | 37,298 |  |
2021 |  | 39,251 |  | 61,898 |  | 39,251 |  | 61,898 |  |
2020 |  | 56,216 |  | 56,262 |  | 56,216 |  | 56,262 |  |
2019 |  | 50,724 |  | 32,761 |  | 50,724 |  | 32,761 |  |
2018 |  | 30,039 |  | 27,906 |  | 30,039 |  | 27,906 |  |
Prior |  | 126,897 |  | 124,325 |  | 126,897 |  | 124,325 |  |
Revolving Loans |  | 765,079 |  | 741,952 |  | 765,079 |  | 741,952 |  |
Revolving converted to Term |  | 4,190 |  | 3,190 |  | 4,190 |  | 3,190 |  |
Total loans | [1] | 1,094,125 |  |  |  | 1,094,125 |  |  |  |
Total loans | [1] |  |  | 1,085,592 |  |  |  | 1,085,592 |  |
Home Equity Loan [Member] | Default [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2021 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2020 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2019 |  | 0 |  | 122 |  | 0 |  | 122 |  |
2018 |  | 0 |  | 0 |  | 0 |  | 0 |  |
Prior |  | 0 |  | 285 |  | 0 |  | 285 |  |
Revolving Loans |  | 1,289 |  | 1,171 |  | 1,289 |  | 1,171 |  |
Revolving converted to Term |  | 141 |  | 0 |  | 141 |  | 0 |  |
Total loans | [1] | 1,430 |  |  |  | 1,430 |  |  |  |
Total loans | [1] |  |  | 1,578 |  |  |  | 1,578 |  |
Consumer Loan [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 538 |  | 383 |  | 538 |  | 383 |  |
2021 |  | 320 |  | 2,512 |  | 320 |  | 2,512 |  |
2020 |  | 1,370 |  | 1,969 |  | 1,370 |  | 1,969 |  |
2019 |  | 912 |  | 1,370 |  | 912 |  | 1,370 |  |
2018 |  | 410 |  | 380 |  | 410 |  | 380 |  |
Prior |  | 2,173 |  | 3,641 |  | 2,173 |  | 3,641 |  |
Revolving Loans |  | 24,845 |  | 22,681 |  | 24,845 |  | 22,681 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 30,568 |  |  |  | 30,568 |  |  |  |
Total loans | [1] |  |  | 32,936 |  |  |  | 32,936 |  |
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2023 |  |  |  |  |  | 1,836 |  |  |  |
2022 |  |  |  |  |  | 0 |  |  |  |
2021 |  |  |  |  |  | 0 |  |  |  |
2020 |  |  |  |  |  | 0 |  |  |  |
2019 |  |  |  |  |  | 0 |  |  |  |
Prior |  |  |  |  |  | 7 |  |  |  |
Revolving Loans |  |  |  |  |  | 15 |  |  |  |
Revolving converted to Term |  |  |  |  |  | 0 |  |  |  |
Total |  |  |  |  |  | 1,858 |  |  |  |
Consumer Loan [Member] | Pass [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 538 |  | 383 |  | 538 |  | 383 |  |
2021 |  | 320 |  | 2,498 |  | 320 |  | 2,498 |  |
2020 |  | 1,370 |  | 1,969 |  | 1,370 |  | 1,969 |  |
2019 |  | 912 |  | 1,370 |  | 912 |  | 1,370 |  |
2018 |  | 410 |  | 380 |  | 410 |  | 380 |  |
Prior |  | 2,154 |  | 3,630 |  | 2,154 |  | 3,630 |  |
Revolving Loans |  | 24,843 |  | 22,680 |  | 24,843 |  | 22,680 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 30,547 |  |  |  | 30,547 |  |  |  |
Total loans | [1] |  |  | 32,910 |  |  |  | 32,910 |  |
Consumer Loan [Member] | Default [Member] |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
2022 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2021 |  | 0 |  | 14 |  | 0 |  | 14 |  |
2020 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2019 |  | 0 |  | 0 |  | 0 |  | 0 |  |
2018 |  | 0 |  | 0 |  | 0 |  | 0 |  |
Prior |  | 19 |  | 11 |  | 19 |  | 11 |  |
Revolving Loans |  | 2 |  | 1 |  | 2 |  | 1 |  |
Revolving converted to Term |  | 0 |  | 0 |  | 0 |  | 0 |  |
Total loans | [1] | 21 |  |  |  | 21 |  |  |  |
Total loans | [1] |  |  | 26 |  |  |  | 26 |  |
Loans Insured or Guaranteed by US Government Authorities |  |  |  |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] |  |  |  |  |  |  |  |  |  |
Total loans |  | $ 5,100 |  | $ 11,100 |  | $ 5,100 |  | $ 11,100 |  |
[1] | Loan origination dates in the tables above reflect the original origination date, or the date of a material modification of a previously originated loan.(2)Loans originated as part of the Paycheck Protection Program ("PPP") established by the Coronavirus Aid, Relief and Economic Security Act (the "CARES Act") are included within commercial and industrial under the 2021 and 2020 vintage year and "pass" category as these loans are 100% guaranteed by the U.S. Government. Outstanding PPP loans totaled $5.1 million and $11.1 million as of September 30, 2023 and 2022, respectively.
[2] | (3)Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances and the associated gross write-offs.

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