Loans (Retail Loan Portfolio Categorized by Performance Status) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Residential Real Estate Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	$ 36,246	$ 112,704
Prior Fiscal Year 1	113,485	80,501
Prior Fiscal Year 2	76,941	81,513
Prior Fiscal Year 3	77,209	110,955
Prior Fiscal Year 4	103,780	71,462
Prior	240,580	192,687
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	648,241	649,822
Residential Real Estate Loans [Member] | Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	36,246	112,704
Prior Fiscal Year 1	113,089	80,117
Prior Fiscal Year 2	76,412	80,323
Prior Fiscal Year 3	76,403	109,601
Prior Fiscal Year 4	102,516	70,325
Prior	237,785	190,388
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	642,451	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	396	384
Prior Fiscal Year 2	529	1,190
Prior Fiscal Year 3	806	1,354
Prior Fiscal Year 4	1,264	1,137
Prior	2,795	2,299
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	5,790	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	109	95
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	109	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	71,681	72,183
Revolving Loans Converted to Term	4,522	5,184
Total	76,203	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	71,630	72,128
Revolving Loans Converted to Term	4,341	5,018
Total	75,971	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	51	55
Revolving Loans Converted to Term	181	166
Total	232	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	170,602	247,918
Prior Fiscal Year 1	200,904	337,452
Prior Fiscal Year 2	261,262	234,164
Prior Fiscal Year 3	169,325	79,032
Prior Fiscal Year 4	50,464	31,315
Prior	22,094	18,950
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	874,651	948,831
Consumer Indirect [Member] | Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	170,455	247,194
Prior Fiscal Year 1	200,312	336,369
Prior Fiscal Year 2	260,279	232,891
Prior Fiscal Year 3	168,344	78,652
Prior Fiscal Year 4	50,062	31,091
Prior	21,908	18,820
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	871,360	945,017
Consumer Indirect [Member] | Non-Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	147	724
Prior Fiscal Year 1	592	1,083
Prior Fiscal Year 2	983	1,273
Prior Fiscal Year 3	981	380
Prior Fiscal Year 4	402	224
Prior	186	130
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	3,291	3,814
Consumer Indirect [Member] | Current Period Gross Write-offs [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	100	1,371
Prior Fiscal Year 1	3,585	6,279
Prior Fiscal Year 2	4,553	5,845
Prior Fiscal Year 3	3,475	1,787
Prior Fiscal Year 4	1,352	1,282
Prior	1,308	1,459
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	14,373	18,023
Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	6,493	35,496
Prior Fiscal Year 1	30,580	3,990
Prior Fiscal Year 2	2,641	1,424
Prior Fiscal Year 3	872	949
Prior Fiscal Year 4	413	217
Prior	266	256
Revolving Loans Amortized Cost Basis	2,469	2,768
Revolving Loans Converted to Term	0	0
Total	43,734	45,100
Other Consumer [Member] | Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	6,489	35,483
Prior Fiscal Year 1	30,578	3,990
Prior Fiscal Year 2	2,641	1,424
Prior Fiscal Year 3	872	949
Prior Fiscal Year 4	413	217
Prior	259	256
Revolving Loans Amortized Cost Basis	2,433	2,747
Revolving Loans Converted to Term	0	0
Total	43,685	45,066
Other Consumer [Member] | Non-Performing [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	4	13
Prior Fiscal Year 1	2	0
Prior Fiscal Year 2	0	0
Prior Fiscal Year 3	0	0
Prior Fiscal Year 4	0	0
Prior	7	0
Revolving Loans Amortized Cost Basis	36	21
Revolving Loans Converted to Term	0	0
Total	49	34
Other Consumer [Member] | Current Period Gross Write-offs [Member]
Financing Receivable Recorded Investment [Line Items]
Current Fiscal Year	428	902
Prior Fiscal Year 1	79	127
Prior Fiscal Year 2	118	105
Prior Fiscal Year 3	25	52
Prior Fiscal Year 4	25	31
Prior	4	20
Revolving Loans Amortized Cost Basis	88	47
Revolving Loans Converted to Term	0	0
Total	$ 767	$ 1,284