Loans (Retail Loan Portfolio Categorized by Performance Status) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Residential Real Estate Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	$ 8,514	$ 112,704
Prior Fiscal Year 1	114,721	80,501
Prior Fiscal Year 2	79,793	81,513
Prior Fiscal Year 3	79,811	110,955
Prior Fiscal Year 4	108,791	71,462
Prior	256,530	192,687
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	648,160	649,822
Residential Real Estate Loans [Member] | Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	8,514	112,704
Prior Fiscal Year 1	114,423	80,117
Prior Fiscal Year 2	79,271	80,323
Prior Fiscal Year 3	78,727	109,601
Prior Fiscal Year 4	107,364	70,325
Prior	253,064	190,388
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	641,363	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	298	384
Prior Fiscal Year 2	522	1,190
Prior Fiscal Year 3	1,084	1,354
Prior Fiscal Year 4	1,427	1,137
Prior	3,466	2,299
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	6,797	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	0	95
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	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	70,531	72,183
Revolving Loans Converted to Term	5,137	5,184
Total	75,668	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	70,458	72,128
Revolving Loans Converted to Term	4,975	5,018
Total	75,433	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	73	55
Revolving Loans Converted to Term	162	166
Total	235	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	54,006	247,918
Prior Fiscal Year 1	235,281	337,452
Prior Fiscal Year 2	311,635	234,164
Prior Fiscal Year 3	211,756	79,032
Prior Fiscal Year 4	69,094	31,315
Prior	38,656	18,950
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	920,428	948,831
Consumer Indirect [Member] | Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	54,006	247,194
Prior Fiscal Year 1	234,715	336,369
Prior Fiscal Year 2	310,666	232,891
Prior Fiscal Year 3	210,874	78,652
Prior Fiscal Year 4	68,800	31,091
Prior	38,487	18,820
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	917,548	945,017
Consumer Indirect [Member] | Non-Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	0	724
Prior Fiscal Year 1	566	1,083
Prior Fiscal Year 2	969	1,273
Prior Fiscal Year 3	882	380
Prior Fiscal Year 4	294	224
Prior	169	130
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	2,880	3,814
Consumer Indirect [Member] | Current Period Gross Write-offs [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	0	1,371
Prior Fiscal Year 1	1,357	6,279
Prior Fiscal Year 2	2,245	5,845
Prior Fiscal Year 3	1,422	1,787
Prior Fiscal Year 4	504	1,282
Prior	689	1,459
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	6,217	18,023
Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	1,924	35,496
Prior Fiscal Year 1	35,157	3,990
Prior Fiscal Year 2	3,489	1,424
Prior Fiscal Year 3	1,228	949
Prior Fiscal Year 4	751	217
Prior	385	256
Revolving Loans Amortized Cost Basis	2,236	2,768
Revolving Loans Converted to Term	0	0
Total	45,170	45,100
Other Consumer [Member] | Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	1,924	35,483
Prior Fiscal Year 1	35,157	3,990
Prior Fiscal Year 2	3,489	1,424
Prior Fiscal Year 3	1,228	949
Prior Fiscal Year 4	751	217
Prior	385	256
Revolving Loans Amortized Cost Basis	2,200	2,747
Revolving Loans Converted to Term	0	0
Total	45,134	45,066
Other Consumer [Member] | Non-Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	0	13
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	36	21
Revolving Loans Converted to Term	0	0
Total	36	$ 34
Other Consumer [Member] | Current Period Gross Write-offs [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	93
Prior Fiscal Year 1	42
Prior Fiscal Year 2	75
Prior Fiscal Year 3	7
Prior Fiscal Year 4	16
Prior	4
Revolving Loans Amortized Cost Basis	32
Revolving Loans Converted to Term	0
Total	$ 269