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Loans (Retail Loan Portfolio Categorized by Performance Status) (Details) - USD ($) $ in Thousands | Sep. 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

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