Basis of Presentation and Significant Accounting Policies, Pre-tax Impact Adoption of ASU (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022	Jan. 31, 2022	Dec. 31, 2021
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	$ (62,080)	$ (61,032)	$ (61,007)	$ (61,007)
Real Estate [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(44,466)		(41,149)	(42,452)
Commercial Real Estate [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(17,879)		(17,379)	(28,536)
Agricultural [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(16,837)		(14,580)	(9,613)
Residential and Home Equity [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(6,874)	(6,759)	(5,879)	(2,847)
Construction [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(2,876)	(3,777)	(3,311)	(1,456)
Commercial and Industrial [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(10,139)		(11,417)	(11,489)
Agricultural [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(5,669)		(6,363)	(5,465)
Commercial Leases [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(1,645)	(1,466)	(1,567)	(938)
Consumer and Other [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	$ (161)	$ (421)	(511)	$ (663)
Reported Pre-Adoption [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(61,007)
Reported Pre-Adoption [Member] | Real Estate [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(42,452)
Reported Pre-Adoption [Member] | Commercial Real Estate [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(28,536)
Reported Pre-Adoption [Member] | Agricultural [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(9,613)
Reported Pre-Adoption [Member] | Residential and Home Equity [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(2,847)
Reported Pre-Adoption [Member] | Construction [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(1,456)
Reported Pre-Adoption [Member] | Commercial and Industrial [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(11,489)
Reported Pre-Adoption [Member] | Agricultural [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(5,465)
Reported Pre-Adoption [Member] | Commercial Leases [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(938)
Reported Pre-Adoption [Member] | Consumer and Other [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(663)
Impact of ASC 326 Adoption [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			0
Impact of ASC 326 Adoption [Member] | Real Estate [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			1,303
Impact of ASC 326 Adoption [Member] | Commercial Real Estate [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			11,157
Impact of ASC 326 Adoption [Member] | Agricultural [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(4,967)
Impact of ASC 326 Adoption [Member] | Residential and Home Equity [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(3,032)
Impact of ASC 326 Adoption [Member] | Construction [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(1,855)
Impact of ASC 326 Adoption [Member] | Commercial and Industrial [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			72
Impact of ASC 326 Adoption [Member] | Agricultural [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(898)
Impact of ASC 326 Adoption [Member] | Commercial Leases [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			(629)
Impact of ASC 326 Adoption [Member] | Consumer and Other [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses			$ 152