Loans and Allowance - Amortized Cost Basis Of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	$ 38,250	$ 39,531
Allowance on Collateral Dependent Loans	195,984	195,397	$ 201,082	$ 130,648
Commercial and industrial loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	8,111	8,075
Agricultural land, production and other loans to farmers
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment		775
Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	645	685
Commercial real estate, non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	21,919	23,652
Commercial real estate, owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	2,351	1,044
Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	4,836	4,906
Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	388	394
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	24,270	25,220
Commercial Real Estate | Commercial and industrial loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Commercial Real Estate | Agricultural land, production and other loans to farmers
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment		524
Commercial Real Estate | Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Commercial Real Estate | Commercial real estate, non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	21,919	23,652
Commercial Real Estate | Commercial real estate, owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	2,351	1,044
Commercial Real Estate | Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Commercial Real Estate | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	5,869	5,985
Residential | Commercial and industrial loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Residential | Agricultural land, production and other loans to farmers
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment		0
Residential | Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	645	685
Residential | Commercial real estate, non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Residential | Commercial real estate, owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Residential | Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	4,836	4,906
Residential | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	388	394
Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	8,111	8,326
Other | Commercial and industrial loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	8,111	8,075
Other | Agricultural land, production and other loans to farmers
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment		251
Other | Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Other | Commercial real estate, non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Other | Commercial real estate, owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Other | Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Other | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0	0
Collateral Dependent
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance on Collateral Dependent Loans	6,113	8,633
Collateral Dependent | Commercial and industrial loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance on Collateral Dependent Loans	2,513	2,672
Collateral Dependent | Agricultural land, production and other loans to farmers
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance on Collateral Dependent Loans		0
Collateral Dependent | Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance on Collateral Dependent Loans	32	82
Collateral Dependent | Commercial real estate, non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance on Collateral Dependent Loans	3,190	5,510
Collateral Dependent | Commercial real estate, owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance on Collateral Dependent Loans	34	0
Collateral Dependent | Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance on Collateral Dependent Loans	281	305
Collateral Dependent | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance on Collateral Dependent Loans	$ 63	$ 64