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Loans, Recorded Investment in Loan Classes Based on Payment Activity, By Origination Year (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
Total loans | $ 2,239,659 |  | $ 2,248,836
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract] |  |  |
Gross charge-offs | 674 | $ 7 |
Residential Real Estate [Member] |  |  |
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
2024/2023 | 2,298 |  | 19,082
2023/2022 | 19,866 |  | 94,105
2022/2021 | 93,362 |  | 48,540
2021/2020 | 47,755 |  | 30,336
2020/2019 | 29,982 |  | 18,923
Prior | 115,326 |  | 99,213
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loans | 308,589 |  | 310,199
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract] |  |  |
2024/2023 | 0 |  | 0
2023/2022 | 0 |  | 0
2022/2021 | 0 |  | 0
2021/2020 | 0 |  | 0
2020/2019 | 0 |  | 0
Prior | 0 |  | 1
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Gross charge-offs | 0 |  | 1
Residential Real Estate [Member] | Performing [Member] |  |  |
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
2024/2023 | 2,298 |  | 19,082
2023/2022 | 19,300 |  | 93,706
2022/2021 | 92,970 |  | 47,774
2021/2020 | 47,003 |  | 29,940
2020/2019 | 29,594 |  | 18,923
Prior | 113,968 |  | 97,813
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loans | 305,133 |  | 307,238
Residential Real Estate [Member] | Nonperforming [Member] |  |  |
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
2024/2023 | 0 |  | 0
2023/2022 | 566 |  | 399
2022/2021 | 392 |  | 766
2021/2020 | 752 |  | 396
2020/2019 | 388 |  | 0
Prior | 1,358 |  | 1,400
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loans | 3,456 |  | 2,961
Home Equity [Member] |  |  |
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
2024/2023 | 430 |  | 3,877
2023/2022 | 3,887 |  | 3,008
2022/2021 | 2,828 |  | 1,886
2021/2020 | 1,793 |  | 1,954
2020/2019 | 1,851 |  | 2,462
Prior | 9,727 |  | 7,955
Revolving Loans Amortized Cost Basis | 28,311 |  | 28,286
Revolving Loans Converted to Term | 363 |  | 363
Total loans | 49,190 |  | 49,791
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract] |  |  |
2024/2023 | 0 |  | 0
2023/2022 | 0 |  | 0
2022/2021 | 0 |  | 0
2021/2020 | 0 |  | 0
2020/2019 | 0 |  | 0
Prior | 0 |  | 0
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Gross charge-offs | 0 |  | 0
Home Equity [Member] | Performing [Member] |  |  |
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
2024/2023 | 430 |  | 3,877
2023/2022 | 3,887 |  | 3,008
2022/2021 | 2,828 |  | 1,886
2021/2020 | 1,793 |  | 1,954
2020/2019 | 1,851 |  | 2,462
Prior | 9,674 |  | 7,883
Revolving Loans Amortized Cost Basis | 28,245 |  | 28,219
Revolving Loans Converted to Term | 363 |  | 363
Total loans | 49,071 |  | 49,652
Home Equity [Member] | Nonperforming [Member] |  |  |
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
2024/2023 | 0 |  | 0
2023/2022 | 0 |  | 0
2022/2021 | 0 |  | 0
2021/2020 | 0 |  | 0
2020/2019 | 0 |  | 0
Prior | 53 |  | 72
Revolving Loans Amortized Cost Basis | 66 |  | 67
Revolving Loans Converted to Term | 0 |  | 0
Total loans | 119 |  | 139
Consumer [Member] |  |  |
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
2024/2023 | 1,051 |  | 1,803
2023/2022 | 1,592 |  | 1,000
2022/2021 | 865 |  | 539
2021/2020 | 493 |  | 477
2020/2019 | 427 |  | 557
Prior | 3,817 |  | 3,681
Revolving Loans Amortized Cost Basis | 44,853 |  | 53,254
Revolving Loans Converted to Term | 3 |  | 5
Total loans | 53,101 |  | 61,316
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract] |  |  |
2024/2023 | 0 |  | 0
2023/2022 | 0 |  | 0
2022/2021 | 18 |  | 0
2021/2020 | 0 |  | 0
2020/2019 | 0 |  | 1
Prior | 0 |  | 341
Revolving Loans Amortized Cost Basis | 12 |  | 23
Revolving Loans Converted to Term | 0 |  | 0
Gross charge-offs | 30 |  | 365
Consumer [Member] | Performing [Member] |  |  |
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
2024/2023 | 1,051 |  | 1,803
2023/2022 | 1,592 |  | 979
2022/2021 | 855 |  | 539
2021/2020 | 493 |  | 477
2020/2019 | 407 |  | 557
Prior | 2,986 |  | 2,988
Revolving Loans Amortized Cost Basis | 44,853 |  | 53,254
Revolving Loans Converted to Term | 3 |  | 5
Total loans | 52,240 |  | 60,602
Consumer [Member] | Nonperforming [Member] |  |  |
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
2024/2023 | 0 |  | 0
2023/2022 | 0 |  | 21
2022/2021 | 10 |  | 0
2021/2020 | 0 |  | 0
2020/2019 | 20 |  | 0
Prior | 831 |  | 693
Revolving Loans Amortized Cost Basis | 0 |  | 0
Revolving Loans Converted to Term | 0 |  | 0
Total loans | 861 |  | 714
Mortgage, Home Equity, and Consumer [Member] |  |  |
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
2024/2023 | 3,779 |  | 24,762
2023/2022 | 25,345 |  | 98,113
2022/2021 | 97,055 |  | 50,965
2021/2020 | 50,041 |  | 32,767
2020/2019 | 32,260 |  | 21,942
Prior | 128,870 |  | 110,849
Revolving Loans Amortized Cost Basis | 73,164 |  | 81,540
Revolving Loans Converted to Term | 366 |  | 368
Total loans | 410,880 |  | 421,306
Mortgage, Home Equity, and Consumer [Member] | Performing [Member] |  |  |
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
2024/2023 | 3,779 |  | 24,762
2023/2022 | 24,779 |  | 97,693
2022/2021 | 96,653 |  | 50,199
2021/2020 | 49,289 |  | 32,371
2020/2019 | 31,852 |  | 21,942
Prior | 126,628 |  | 108,684
Revolving Loans Amortized Cost Basis | 73,098 |  | 81,473
Revolving Loans Converted to Term | 366 |  | 368
Total loans | 406,444 |  | 417,492
Mortgage, Home Equity, and Consumer [Member] | Nonperforming [Member] |  |  |
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
2024/2023 | 0 |  | 0
2023/2022 | 566 |  | 420
2022/2021 | 402 |  | 766
2021/2020 | 752 |  | 396
2020/2019 | 408 |  | 0
Prior | 2,242 |  | 2,165
Revolving Loans Amortized Cost Basis | 66 |  | 67
Revolving Loans Converted to Term | 0 |  | 0
Total loans | 4,436 |  | 3,814
Real Estate Loans [Member] | Residential Real Estate [Member] |  |  |
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
Total loans | 357,779 |  | 359,990
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract] |  |  |
Gross charge-offs | 0 | $ 0 |
Real Estate Loans [Member] | Home Equity [Member] |  |  |
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract] |  |  |
Total loans | $ 49,190 |  | $ 49,791

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