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Loans (Retail Loan Portfolio Categorized by Performance Status) (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Residential Real Estate Loans [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year $ 53,282 $ 92,699
Prior Fiscal Year 1 86,820 129,295
Prior Fiscal Year 2 122,024 86,101
Prior Fiscal Year 3 78,572 66,423
Prior Fiscal Year 4 58,181 51,831
Prior 178,942 150,950
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 577,821 577,299
Residential Real Estate Loans [Member] | Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 53,282 92,620
Prior Fiscal Year 1 86,500 129,240
Prior Fiscal Year 2 121,667 85,876
Prior Fiscal Year 3 77,987 65,866
Prior Fiscal Year 4 57,406 50,932
Prior 177,429 150,392
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 574,271 574,926
Residential Real Estate Loans [Member] | Non-Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 0 79
Prior Fiscal Year 1 320 55
Prior Fiscal Year 2 357 225
Prior Fiscal Year 3 585 557
Prior Fiscal Year 4 775 899
Prior 1,513 558
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 3,550 2,373
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 70,421 70,560
Revolving Loans Converted to Term 6,915 7,971
Total 77,336 78,531
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 70,364 70,521
Revolving Loans Converted to Term 6,853 7,810
Total 77,217 78,331
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 57 39
Revolving Loans Converted to Term 62 161
Total 119 200
Consumer Indirect [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 347,919 453,018
Prior Fiscal Year 1 360,340 206,987
Prior Fiscal Year 2 141,584 123,285
Prior Fiscal Year 3 69,404 91,228
Prior Fiscal Year 4 47,611 51,734
Prior 30,565 31,796
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 997,423 958,048
Consumer Indirect [Member] | Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 347,722 452,601
Prior Fiscal Year 1 359,064 206,472
Prior Fiscal Year 2 141,033 122,849
Prior Fiscal Year 3 69,141 90,998
Prior Fiscal Year 4 47,378 51,598
Prior 30,419 31,750
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 994,757 956,268
Consumer Indirect [Member] | Non-Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 197 417
Prior Fiscal Year 1 1,276 515
Prior Fiscal Year 2 551 436
Prior Fiscal Year 3 263 230
Prior Fiscal Year 4 233 136
Prior 146 46
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total 2,666 1,780
Other Consumer [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 5,900 4,422
Prior Fiscal Year 1 3,077 3,738
Prior Fiscal Year 2 2,392 1,681
Prior Fiscal Year 3 938 763
Prior Fiscal Year 4 301 280
Prior 349 1,044
Revolving Loans Amortized Cost Basis 2,875 2,549
Revolving Loans Converted to Term 0 0
Total 15,832 14,477
Other Consumer [Member] | Performing [Member]    
Financing Receivable Recorded Investment [Line Items]    
Current Fiscal Year 5,900 4,422
Prior Fiscal Year 1 3,077 3,738
Prior Fiscal Year 2 2,392 1,681
Prior Fiscal Year 3 938 763
Prior Fiscal Year 4 301 280
Prior 349 1,044
Revolving Loans Amortized Cost Basis 2,875 2,549
Revolving Loans Converted to Term 0 0
Total 15,832 14,477
Other Consumer [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 0 0
Revolving Loans Converted to Term 0 0
Total $ 0 $ 0