Loans - Collateral-dependent Loans by Class (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 3,830,481	$ 3,788,645
Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	23,947	28,459
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	16,558	20,749
Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	540	1,575
Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		272
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	6,849	5,863
Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	608,284	620,106
Commercial and Industrial Loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	9,070	9,420
Commercial and Industrial Loans | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,005	2,078
Commercial and Industrial Loans | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	216	1,219
Commercial and Industrial Loans | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		272
Commercial and Industrial Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	6,849	5,851
Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	2,021,109	1,966,884
Commercial Real Estate Loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	9,085	12,228
Commercial Real Estate Loans | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	9,050	12,192
Commercial Real Estate Loans | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	35	36
Commercial Real Estate Loans | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial Real Estate Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	395,466	417,413
Agricultural Loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,448	5,262
Agricultural Loans | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,160	4,944
Agricultural Loans | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	288	318
Agricultural Loans | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Agricultural Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	60,853	56,396
Leases | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Leases | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	284,517	279,748
Home Equity Loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	475	467
Home Equity Loans | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	475	467
Home Equity Loans | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Home Equity Loans | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Home Equity Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	85,595	79,904
Consumer Loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	9	22
Consumer Loans | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	8	8
Consumer Loans | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1	2
Consumer Loans | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	12
Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	19,328	17,512
Credit Cards | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Credit Cards | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Credit Cards | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Credit Cards | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Credit Cards | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	355,329	350,682
Residential Mortgage Loans | Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	860	1,060
Residential Mortgage Loans | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	860	1,060
Residential Mortgage Loans | Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Residential Mortgage Loans | Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Residential Mortgage Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 0	$ 0