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Loans (Retail Loan Portfolio Categorized by Performance Status) (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Residential Real Estate Loans [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year $ 22,680 $ 54,345
Prior Fiscal Year 1 57,479 111,540
Prior Fiscal Year 2 106,975 75,889
Prior Fiscal Year 3 73,587 75,164
Prior Fiscal Year 4 71,831 101,379
Prior 314,653 231,889
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 647,205 650,206
Residential Real Estate Loans [Member] | Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 22,680 54,345
Prior Fiscal Year 1 57,367 110,882
Prior Fiscal Year 2 106,461 75,264
Prior Fiscal Year 3 73,081 73,754
Prior Fiscal Year 4 70,826 99,943
Prior 310,905 229,100
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 641,320 643,288
Residential Real Estate Loans [Member] | Non-Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 0
Prior Fiscal Year 1 112 658
Prior Fiscal Year 2 514 625
Prior Fiscal Year 3 506 1,410
Prior Fiscal Year 4 1,005 1,436
Prior 3,748 2,789
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 5,885 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 17 0
Prior Fiscal Year 3 0 0
Prior Fiscal Year 4 129 0
Prior 16 109
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 162 109
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 71,637 71,133
Revolving Loans Converted to Term 4,038 4,419
Total 75,675 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 71,496 71,059
Revolving Loans Converted to Term 3,880 4,240
Total 75,376 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 141 74
Revolving Loans Converted to Term 158 179
Total 299 253
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 27 0
Total 27 0
Consumer Indirect [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 158,170 216,226
Prior Fiscal Year 1 188,046 184,399
Prior Fiscal Year 2 152,381 236,392
Prior Fiscal Year 3 186,289 150,193
Prior Fiscal Year 4 112,123 42,124
Prior 36,443 16,438
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 833,452 845,772
Consumer Indirect [Member] | Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 158,095 215,964
Prior Fiscal Year 1 187,733 183,917
Prior Fiscal Year 2 151,811 235,262
Prior Fiscal Year 3 185,473 149,499
Prior Fiscal Year 4 111,617 41,773
Prior 36,152 16,200
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 830,881 842,615
Consumer Indirect [Member] | Non-Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 75 262
Prior Fiscal Year 1 313 482
Prior Fiscal Year 2 570 1,130
Prior Fiscal Year 3 816 694
Prior Fiscal Year 4 506 351
Prior 291 238
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 2,571 3,157
Consumer Indirect [Member] | Current Period Gross Write-offs [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 17 361
Prior Fiscal Year 1 1,095 4,814
Prior Fiscal Year 2 1,915 5,964
Prior Fiscal Year 3 3,163 4,621
Prior Fiscal Year 4 1,918 1,708
Prior 869 1,511
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 8,977 18,979
Other Consumer [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 3,095 7,485
Prior Fiscal Year 1 5,699 28,779
Prior Fiscal Year 2 24,743 2,317
Prior Fiscal Year 3 1,720 735
Prior Fiscal Year 4 455 282
Prior 300 242
Revolving Loans Amortized Cost Basis 2,287 2,917
Revolving Loans Converted to Term 0 0
Total 38,299 42,757
Other Consumer [Member] | Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 3,095 7,482
Prior Fiscal Year 1 5,689 28,777
Prior Fiscal Year 2 24,572 2,316
Prior Fiscal Year 3 1,713 729
Prior Fiscal Year 4 455 281
Prior 300 242
Revolving Loans Amortized Cost Basis 2,250 2,876
Revolving Loans Converted to Term 0 0
Total 38,074 42,703
Other Consumer [Member] | Non-Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 3
Prior Fiscal Year 1 10 2
Prior Fiscal Year 2 171 1
Prior Fiscal Year 3 7 6
Prior Fiscal Year 4 0 1
Prior 0 0
Revolving Loans Amortized Cost Basis 37 41
Revolving Loans Converted to Term 0 0
Total 225 54
Other Consumer [Member] | Current Period Gross Write-offs [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 175 527
Prior Fiscal Year 1 87 129
Prior Fiscal Year 2 414 124
Prior Fiscal Year 3 29 33
Prior Fiscal Year 4 11 27
Prior 11 11
Revolving Loans Amortized Cost Basis 26 92
Revolving Loans Converted to Term 0 0
Total $ 753 $ 943