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Loans (Retail Loan Portfolio Categorized by Payment Status) (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Residential Real Estate Loans [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year $ 54,345 $ 112,704
Prior Fiscal Year 1 111,540 80,501
Prior Fiscal Year 2 75,889 81,513
Prior Fiscal Year 3 75,164 110,955
Prior Fiscal Year 4 101,379 71,462
Prior 231,889 192,687
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 650,206 649,822
Residential Real Estate Loans [Member] | Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 54,345 112,704
Prior Fiscal Year 1 110,882 80,117
Prior Fiscal Year 2 75,264 80,323
Prior Fiscal Year 3 73,754 109,601
Prior Fiscal Year 4 99,943 70,325
Prior 229,100 190,388
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 643,288 643,458
Residential Real Estate Loans [Member] | Non-Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 0
Prior Fiscal Year 1 658 384
Prior Fiscal Year 2 625 1,190
Prior Fiscal Year 3 1,410 1,354
Prior Fiscal Year 4 1,436 1,137
Prior 2,789 2,299
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 6,918 6,364
Residential Real Estate Loans [Member] | Current Period Gross Write-offs [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 0
Prior Fiscal Year 1 0 0
Prior Fiscal Year 2 0 0
Prior Fiscal Year 3 0 0
Prior Fiscal Year 4 0 32
Prior 109 95
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 109 127
Residential Real Estate Lines [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 0
Prior Fiscal Year 1 0 0
Prior Fiscal Year 2 0 0
Prior Fiscal Year 3 0 0
Prior Fiscal Year 4 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 71,133 72,183
Revolving Loans Converted to Term 4,419 5,184
Total 75,552 77,367
Residential Real Estate Lines [Member] | Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 0
Prior Fiscal Year 1 0 0
Prior Fiscal Year 2 0 0
Prior Fiscal Year 3 0 0
Prior Fiscal Year 4 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 71,059 72,128
Revolving Loans Converted to Term 4,240 5,018
Total 75,299 77,146
Residential Real Estate Lines [Member] | Non-Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 0
Prior Fiscal Year 1 0 0
Prior Fiscal Year 2 0 0
Prior Fiscal Year 3 0 0
Prior Fiscal Year 4 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 74 55
Revolving Loans Converted to Term 179 166
Total 253 221
Residential Real Estate Lines [Member] | Current Period Gross Write-offs [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 0
Prior Fiscal Year 1 0 0
Prior Fiscal Year 2 0 0
Prior Fiscal Year 3 0 0
Prior Fiscal Year 4 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 0 28
Revolving Loans Converted to Term 0 13
Total 0 41
Consumer Indirect [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 216,226 247,918
Prior Fiscal Year 1 184,399 337,452
Prior Fiscal Year 2 236,392 234,164
Prior Fiscal Year 3 150,193 79,032
Prior Fiscal Year 4 42,124 31,315
Prior 16,438 18,950
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 845,772 948,831
Consumer Indirect [Member] | Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 215,964 247,194
Prior Fiscal Year 1 183,917 336,369
Prior Fiscal Year 2 235,262 232,891
Prior Fiscal Year 3 149,499 78,652
Prior Fiscal Year 4 41,773 31,091
Prior 16,200 18,820
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 842,615 945,017
Consumer Indirect [Member] | Non-Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 262 724
Prior Fiscal Year 1 482 1,083
Prior Fiscal Year 2 1,130 1,273
Prior Fiscal Year 3 694 380
Prior Fiscal Year 4 351 224
Prior 238 130
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 3,157 3,814
Consumer Indirect [Member] | Current Period Gross Write-offs [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 361 1,371
Prior Fiscal Year 1 4,814 6,279
Prior Fiscal Year 2 5,964 5,845
Prior Fiscal Year 3 4,621 1,787
Prior Fiscal Year 4 1,708 1,282
Prior 1,511 1,459
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 18,979 18,023
Other Consumer [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 7,485 35,496
Prior Fiscal Year 1 28,779 3,990
Prior Fiscal Year 2 2,317 1,424
Prior Fiscal Year 3 735 949
Prior Fiscal Year 4 282 217
Prior 242 256
Revolving Loans Amortized Cost Basis 2,917 2,768
Revolving Loans Converted to Term 0 0
Total 42,757 45,100
Other Consumer [Member] | Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 7,482 35,483
Prior Fiscal Year 1 28,777 3,990
Prior Fiscal Year 2 2,316 1,424
Prior Fiscal Year 3 729 949
Prior Fiscal Year 4 281 217
Prior 242 256
Revolving Loans Amortized Cost Basis 2,876 2,747
Revolving Loans Converted to Term 0 0
Total 42,703 45,066
Other Consumer [Member] | Non-Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 3 13
Prior Fiscal Year 1 2 0
Prior Fiscal Year 2 1 0
Prior Fiscal Year 3 6 0
Prior Fiscal Year 4 1 0
Prior 0 0
Revolving Loans Amortized Cost Basis 41 21
Revolving Loans Converted to Term 0 0
Total 54 34
Other Consumer [Member] | Current Period Gross Write-offs [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 527 902
Prior Fiscal Year 1 129 127
Prior Fiscal Year 2 124 105
Prior Fiscal Year 3 33 52
Prior Fiscal Year 4 27 31
Prior 11 20
Revolving Loans Amortized Cost Basis 92 47
Revolving Loans Converted to Term 0 0
Total $ 943 $ 1,284