Summary of Significant Accounting Policies, Impact Adoption of ASU (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Jan. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	$ (66,885)	$ (61,007)	$ (61,007)	$ (58,862)	$ (55,012)
Real Estate [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(43,085)	(41,149)	(42,452)
Commercial Real Estate [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(18,055)	(17,379)	(28,536)
Agricultural [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(14,496)	(14,580)	(9,613)
Residential and Home Equity [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(7,508)	(5,879)	(2,847)	(2,984)	(3,530)
Construction [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(3,026)	(3,311)	(1,456)	(1,643)	(1,949)
Commercial and Industrial [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(11,503)	(11,417)	(11,489)
Agricultural [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(10,202)	(6,363)	(5,465)
Commercial Leases [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	(1,924)	(1,567)	(938)	(1,731)	(3,162)
Consumer and Other [Member]
Pre-tax Impact of Adoption of ASU [Abstract]
Allowance for credit losses	$ (171)	(511)	$ (663)	$ (1,417)	$ (648)
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