Loans (Collateral-dependent Loans by Class) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 3,977,900	$ 3,788,645
Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	19,733	28,459
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	16,741	20,749
Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,104	1,575
Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	272
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,888	5,863
Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	589,541	620,106
Commercial and Industrial Loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,605	9,420
Commercial and Industrial Loans | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,668	2,078
Commercial and Industrial Loans | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	49	1,219
Commercial and Industrial Loans | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	272
Commercial and Industrial Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,888	5,851
Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,121,835	1,966,884
Commercial Real Estate Loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	8,553	12,228
Commercial Real Estate Loans | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	8,553	12,192
Commercial Real Estate Loans | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	36
Commercial Real Estate Loans | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Commercial Real Estate Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	423,803	417,413
Agricultural Loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,393	5,262
Agricultural Loans | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,338	4,944
Agricultural Loans | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,055	318
Agricultural Loans | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Agricultural Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	71,988	56,396
Leases | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Leases | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Leases | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Leases | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Leases | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	299,685	279,748
Home Equity Loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	420	467
Home Equity Loans | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	420	467
Home Equity Loans | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Home Equity Loans | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Home Equity Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	87,853	79,904
Consumer Loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	9	22
Consumer Loans | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	9	8
Consumer Loans | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	2
Consumer Loans | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Consumer Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	12
Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	20,351	17,512
Credit Cards | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Credit Cards | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Credit Cards | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Credit Cards | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Credit Cards | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	362,844	350,682
Residential Mortgage Loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	753	1,060
Residential Mortgage Loans | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	753	1,060
Residential Mortgage Loans | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Residential Mortgage Loans | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Residential Mortgage Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 0	$ 0