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Loans, Recorded Investment in Loan Classes Based on Payment Activity, By Origination Year (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract]          
Total loans $ 2,331,002   $ 2,331,002   $ 2,248,836
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]          
Gross charge-offs 1,212 $ 808 2,568 $ 819  
Residential Real Estate [Member]          
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract]          
2024/2023 7,235   7,235   19,082
2023/2022 22,622   22,622   94,105
2022/2021 90,476   90,476   48,540
2021/2020 47,282   47,282   30,336
2020/2019 28,491   28,491   18,923
Prior 107,373   107,373   99,213
Revolving Loans Amortized Cost Basis 0   0   0
Revolving Loans Converted to Term 0   0   0
Total loans 303,479   303,479   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     4   1
Revolving Loans Amortized Cost Basis     0   0
Revolving Loans Converted to Term     0   0
Gross charge-offs     4   1
Residential Real Estate [Member] | Performing [Member]          
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract]          
2024/2023 7,235   7,235   19,082
2023/2022 22,622   22,622   93,706
2022/2021 90,094   90,094   47,774
2021/2020 46,422   46,422   29,940
2020/2019 28,023   28,023   18,923
Prior 106,310   106,310   97,813
Revolving Loans Amortized Cost Basis 0   0   0
Revolving Loans Converted to Term 0   0   0
Total loans 300,706   300,706   307,238
Residential Real Estate [Member] | Nonperforming [Member]          
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract]          
2024/2023 0   0   0
2023/2022 0   0   399
2022/2021 382   382   766
2021/2020 860   860   396
2020/2019 468   468   0
Prior 1,063   1,063   1,400
Revolving Loans Amortized Cost Basis 0   0   0
Revolving Loans Converted to Term 0   0   0
Total loans 2,773   2,773   2,961
Home Equity [Member]          
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract]          
2024/2023 2,300   2,300   3,877
2023/2022 3,628   3,628   3,008
2022/2021 2,508   2,508   1,886
2021/2020 1,582   1,582   1,954
2020/2019 1,729   1,729   2,462
Prior 8,599   8,599   7,955
Revolving Loans Amortized Cost Basis 28,985   28,985   28,286
Revolving Loans Converted to Term 444   444   363
Total loans 49,775   49,775   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 2,300   2,300   3,877
2023/2022 3,628   3,628   3,008
2022/2021 2,508   2,508   1,886
2021/2020 1,582   1,582   1,954
2020/2019 1,663   1,663   2,462
Prior 8,517   8,517   7,883
Revolving Loans Amortized Cost Basis 28,985   28,985   28,219
Revolving Loans Converted to Term 444   444   363
Total loans 49,627   49,627   49,652
Home Equity [Member] | Nonperforming [Member]          
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract]          
2024/2023 0   0   0
2023/2022 0   0   0
2022/2021 0   0   0
2021/2020 0   0   0
2020/2019 66   66   0
Prior 82   82   72
Revolving Loans Amortized Cost Basis 0   0   67
Revolving Loans Converted to Term 0   0   0
Total loans 148   148   139
Consumer [Member]          
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract]          
2024/2023 1,696   1,696   1,803
2023/2022 1,064   1,064   1,000
2022/2021 652   652   539
2021/2020 440   440   477
2020/2019 348   348   557
Prior 3,482   3,482   3,681
Revolving Loans Amortized Cost Basis 135,381   135,381   53,254
Revolving Loans Converted to Term 1   1   5
Total loans 143,064   143,064   61,316
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]          
2024/2023     0   0
2023/2022     10   0
2022/2021     25   0
2021/2020     0   0
2020/2019     0   1
Prior     5   341
Revolving Loans Amortized Cost Basis     22   23
Revolving Loans Converted to Term     0   0
Gross charge-offs     62   365
Consumer [Member] | Performing [Member]          
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract]          
2024/2023 1,696   1,696   1,803
2023/2022 1,060   1,060   979
2022/2021 650   650   539
2021/2020 440   440   477
2020/2019 342   342   557
Prior 2,627   2,627   2,988
Revolving Loans Amortized Cost Basis 135,381   135,381   53,254
Revolving Loans Converted to Term 1   1   5
Total loans 142,197   142,197   60,602
Consumer [Member] | Nonperforming [Member]          
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract]          
2024/2023 0   0   0
2023/2022 4   4   21
2022/2021 2   2   0
2021/2020 0   0   0
2020/2019 6   6   0
Prior 855   855   693
Revolving Loans Amortized Cost Basis 0   0   0
Revolving Loans Converted to Term 0   0   0
Total loans 867   867   714
Mortgage, Home Equity, and Consumer [Member]          
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract]          
2024/2023 11,231   11,231   24,762
2023/2022 27,314   27,314   98,113
2022/2021 93,636   93,636   50,965
2021/2020 49,304   49,304   32,767
2020/2019 30,568   30,568   21,942
Prior 119,454   119,454   110,849
Revolving Loans Amortized Cost Basis 164,366   164,366   81,540
Revolving Loans Converted to Term 445   445   368
Total loans 496,318   496,318   421,306
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]          
2024/2023     0   0
2023/2022     10   0
2022/2021     25   0
2021/2020     0   0
2020/2019     0   1
Prior     9   342
Revolving Loans Amortized Cost Basis     22   23
Revolving Loans Converted to Term     0   0
Gross charge-offs     66   366
Mortgage, Home Equity, and Consumer [Member] | Performing [Member]          
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract]          
2024/2023 11,231   11,231   24,762
2023/2022 27,310   27,310   97,693
2022/2021 93,252   93,252   50,199
2021/2020 48,444   48,444   32,371
2020/2019 30,028   30,028   21,942
Prior 117,454   117,454   108,684
Revolving Loans Amortized Cost Basis 164,366   164,366   81,473
Revolving Loans Converted to Term 445   445   368
Total loans 492,530   492,530   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   0
2023/2022 4   4   420
2022/2021 384   384   766
2021/2020 860   860   396
2020/2019 540   540   0
Prior 2,000   2,000   2,165
Revolving Loans Amortized Cost Basis 0   0   67
Revolving Loans Converted to Term 0   0   0
Total loans 3,788   3,788   3,814
Real Estate Loans [Member] | Residential Real Estate [Member]          
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract]          
Total loans 353,254   353,254   359,990
Financing Receivable, Current period gross charge-offs by Portfolio Class and Origination Year [Abstract]          
Gross charge-offs 4 $ 0 4 $ 1  
Real Estate Loans [Member] | Home Equity [Member]          
Financing Receivable, Credit Exposures by Internally Assigned Grades, by Origination Year [Abstract]          
Total loans $ 49,775   $ 49,775   $ 49,791