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Loans (Retail Loan Portfolio Categorized by Performance Status) (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Residential Real Estate Loans [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year $ 7,278 $ 54,345
Prior Fiscal Year 1 55,394 111,540
Prior Fiscal Year 2 109,692 75,889
Prior Fiscal Year 3 74,647 75,164
Prior Fiscal Year 4 73,732 101,379
Prior 323,240 231,889
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 643,983 650,206
Residential Real Estate Loans [Member] | Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 7,278 54,345
Prior Fiscal Year 1 55,394 110,882
Prior Fiscal Year 2 109,236 75,264
Prior Fiscal Year 3 74,207 73,754
Prior Fiscal Year 4 72,467 99,943
Prior 319,366 229,100
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 637,948 643,288
Residential Real Estate Loans [Member] | Non-Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 0
Prior Fiscal Year 1 0 658
Prior Fiscal Year 2 456 625
Prior Fiscal Year 3 440 1,410
Prior Fiscal Year 4 1,265 1,436
Prior 3,874 2,789
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 6,035 6,918
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 49 0
Prior 16 109
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 65 109
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 70,540 71,133
Revolving Loans Converted to Term 4,229 4,419
Total 74,769 75,552
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 70,401 71,059
Revolving Loans Converted to Term 4,052 4,240
Total 74,453 75,299
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 139 74
Revolving Loans Converted to Term 177 179
Total 316 253
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 0
Revolving Loans Converted to Term 0 0
Total 0 0
Consumer Indirect [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 91,991 216,226
Prior Fiscal Year 1 203,760 184,399
Prior Fiscal Year 2 168,858 236,392
Prior Fiscal Year 3 211,576 150,193
Prior Fiscal Year 4 130,473 42,124
Prior 46,518 16,438
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 853,176 845,772
Consumer Indirect [Member] | Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 91,991 215,964
Prior Fiscal Year 1 203,478 183,917
Prior Fiscal Year 2 168,101 235,262
Prior Fiscal Year 3 210,863 149,499
Prior Fiscal Year 4 129,711 41,773
Prior 46,115 16,200
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 850,259 842,615
Consumer Indirect [Member] | Non-Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 262
Prior Fiscal Year 1 282 482
Prior Fiscal Year 2 757 1,130
Prior Fiscal Year 3 713 694
Prior Fiscal Year 4 762 351
Prior 403 238
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 2,917 3,157
Consumer Indirect [Member] | Current Period Gross Write-offs [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 361
Prior Fiscal Year 1 534 4,814
Prior Fiscal Year 2 971 5,964
Prior Fiscal Year 3 1,887 4,621
Prior Fiscal Year 4 957 1,708
Prior 479 1,511
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 4,828 18,979
Other Consumer [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 4,842 7,485
Prior Fiscal Year 1 6,396 28,779
Prior Fiscal Year 2 26,903 2,317
Prior Fiscal Year 3 2,006 735
Prior Fiscal Year 4 591 282
Prior 389 242
Revolving Loans Amortized Cost Basis 2,826 2,917
Revolving Loans Converted to Term 0 0
Total 43,953 42,757
Other Consumer [Member] | Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 4,842 7,482
Prior Fiscal Year 1 6,389 28,777
Prior Fiscal Year 2 26,678 2,316
Prior Fiscal Year 3 2,006 729
Prior Fiscal Year 4 591 281
Prior 387 242
Revolving Loans Amortized Cost Basis 2,781 2,876
Revolving Loans Converted to Term 0 0
Total 43,674 42,703
Other Consumer [Member] | Non-Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 3
Prior Fiscal Year 1 7 2
Prior Fiscal Year 2 225 1
Prior Fiscal Year 3 0 6
Prior Fiscal Year 4 0 1
Prior 2 0
Revolving Loans Amortized Cost Basis 45 41
Revolving Loans Converted to Term 0 0
Total 279 54
Other Consumer [Member] | Current Period Gross Write-offs [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 527
Prior Fiscal Year 1 106 129
Prior Fiscal Year 2 73 124
Prior Fiscal Year 3 13 33
Prior Fiscal Year 4 6 27
Prior 5 11
Revolving Loans Amortized Cost Basis 9 92
Revolving Loans Converted to Term 0 0
Total $ 212 $ 943