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Loans - Residential, Home Equity and Consumer Loans Based on Payment Activity (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, Credit Quality Indicator [Line Items] |  |  |  |  |
Total | $ 3,893,573 |  | $ 3,893,573 |  | $ 3,788,645
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Total | 650 | $ 820 | 2,737 | $ 1,636 |
Consumer Loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
2023-2022 | 40,112 |  | 40,112 |  | 42,688
2022-2021 | 28,353 |  | 28,353 |  | 22,727
2021-2020 | 10,863 |  | 10,863 |  | 5,822
2020-2019 | 3,716 |  | 3,716 |  | 2,402
2019-2018 | 1,139 |  | 1,139 |  | 1,545
Prior | 2,126 |  | 2,126 |  | 1,563
Revolving Loans Amortized Cost Basis | 2,667 |  | 2,667 |  | 3,157
Total | 88,976 |  | 88,976 |  | 79,904
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
2023 |  |  | 880 |  |
2022 |  |  | 42 |  |
2021 |  |  | 23 |  |
2020 |  |  | 24 |  |
2019 |  |  | 3 |  |
Prior |  |  | 1 |  |
Revolving Loans Amortized Cost Basis |  |  | 7 |  |
Total | 352 | 495 | 980 | 1,027 |
Consumer Loans | Performing |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
2023-2022 | 40,108 |  | 40,108 |  | 42,685
2022-2021 | 28,347 |  | 28,347 |  | 22,708
2021-2020 | 10,852 |  | 10,852 |  | 5,610
2020-2019 | 3,710 |  | 3,710 |  | 2,394
2019-2018 | 1,139 |  | 1,139 |  | 1,543
Prior | 2,121 |  | 2,121 |  | 1,553
Revolving Loans Amortized Cost Basis | 2,667 |  | 2,667 |  | 3,157
Total | 88,944 |  | 88,944 |  | 79,650
Consumer Loans | Nonperforming |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
2023-2022 | 4 |  | 4 |  | 3
2022-2021 | 6 |  | 6 |  | 19
2021-2020 | 11 |  | 11 |  | 212
2020-2019 | 6 |  | 6 |  | 8
2019-2018 | 0 |  | 0 |  | 2
Prior | 5 |  | 5 |  | 10
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 32 |  | 32 |  | 254
Home Equity Loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
2023-2022 | 225 |  | 225 |  | 63
2022-2021 | 118 |  | 118 |  | 20
2021-2020 | 338 |  | 338 |  | 0
2020-2019 | 90 |  | 90 |  | 0
2019-2018 | 68 |  | 68 |  | 19
Prior | 1,106 |  | 1,106 |  | 592
Revolving Loans Amortized Cost Basis | 284,935 |  | 284,935 |  | 279,054
Total | 286,880 |  | 286,880 |  | 279,748
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
2023 |  |  | 0 |  |
2022 |  |  | 0 |  |
2021 |  |  | 0 |  |
2020 |  |  | 0 |  |
2019 |  |  | 0 |  |
Prior |  |  | 24 |  |
Revolving Loans Amortized Cost Basis |  |  | 15 |  |
Total | 0 | 5 | 39 | 57 |
Home Equity Loans | Performing |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
2023-2022 | 225 |  | 225 |  | 63
2022-2021 | 118 |  | 118 |  | 0
2021-2020 | 87 |  | 87 |  | 0
2020-2019 | 90 |  | 90 |  | 0
2019-2018 | 68 |  | 68 |  | 0
Prior | 1,014 |  | 1,014 |  | 591
Revolving Loans Amortized Cost Basis | 284,657 |  | 284,657 |  | 278,784
Total | 286,259 |  | 286,259 |  | 279,438
Home Equity Loans | Nonperforming |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
2023-2022 | 0 |  | 0 |  | 0
2022-2021 | 0 |  | 0 |  | 20
2021-2020 | 251 |  | 251 |  | 0
2020-2019 | 0 |  | 0 |  | 0
2019-2018 | 0 |  | 0 |  | 19
Prior | 92 |  | 92 |  | 1
Revolving Loans Amortized Cost Basis | 278 |  | 278 |  | 270
Total | 621 |  | 621 |  | 310
Residential Mortgage Loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
2023-2022 | 40,631 |  | 40,631 |  | 69,982
2022-2021 | 66,656 |  | 66,656 |  | 97,337
2021-2020 | 88,049 |  | 88,049 |  | 47,104
2020-2019 | 42,640 |  | 42,640 |  | 20,080
2019-2018 | 18,439 |  | 18,439 |  | 16,742
Prior | 100,195 |  | 100,195 |  | 99,437
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 356,610 |  | 356,610 |  | 350,682
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
2023 |  |  | 0 |  |
2022 |  |  | 0 |  |
2021 |  |  | 22 |  |
2020 |  |  | 36 |  |
2019 |  |  | 0 |  |
Prior |  |  | 0 |  |
Revolving Loans Amortized Cost Basis |  |  | 0 |  |
Total | 1 | 18 | 58 | 21 |
Residential Mortgage Loans | Performing |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
2023-2022 | 40,631 |  | 40,631 |  | 69,982
2022-2021 | 66,546 |  | 66,546 |  | 97,176
2021-2020 | 87,909 |  | 87,909 |  | 46,851
2020-2019 | 42,517 |  | 42,517 |  | 20,080
2019-2018 | 18,330 |  | 18,330 |  | 16,664
Prior | 99,610 |  | 99,610 |  | 98,699
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 355,543 |  | 355,543 |  | 349,452
Residential Mortgage Loans | Nonperforming |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
2023-2022 | 0 |  | 0 |  | 0
2022-2021 | 110 |  | 110 |  | 161
2021-2020 | 140 |  | 140 |  | 253
2020-2019 | 123 |  | 123 |  | 0
2019-2018 | 109 |  | 109 |  | 78
Prior | 585 |  | 585 |  | 738
Revolving Loans Amortized Cost Basis | 0 |  | 0 |  | 0
Total | 1,067 |  | 1,067 |  | 1,230
Commercial and Industrial Loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
2023-2022 | 88,427 |  | 88,427 |  | 158,088
2022-2021 | 141,517 |  | 141,517 |  | 123,425
2021-2020 | 92,978 |  | 92,978 |  | 41,375
2020-2019 | 33,096 |  | 33,096 |  | 47,887
2019-2018 | 38,414 |  | 38,414 |  | 20,002
Prior | 54,780 |  | 54,780 |  | 56,065
Revolving Loans Amortized Cost Basis | 149,681 |  | 149,681 |  | 173,264
Total | 598,893 |  | 598,893 |  | $ 620,106
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
2023 |  |  | 0 |  |
2022 |  |  | 911 |  |
2021 |  |  | 32 |  |
2020 |  |  | 33 |  |
2019 |  |  | 7 |  |
Prior |  |  | 88 |  |
Revolving Loans Amortized Cost Basis |  |  | 181 |  |
Total | $ 175 | $ 238 | $ 1,252 | $ 299 |

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