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Basis of Presentation, Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	$ 15,250	$ 18,552	$ 17,556	$ 17,304
Allowance for Credit Losses - Off-Balance Sheet credit Exposure	1,229	165	165	165
Real Estate Loans [Member] | Residential [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	1,195	1,056	1,070	1,147
Real Estate Loans [Member] | Commercial [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	6,747	10,120	8,394	8,099
Real Estate Loans [Member] | Agricultural [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	3,409	4,589	4,516	4,729
Real Estate Loans [Member] | Construction [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	851	801	497	434
Consumer [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	1,220	135	210	262
Other Commercial Loans [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	712	1,040	1,380	1,023
Other Agricultural Loans [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	250	489	551	558
State and Political Subdivision Loans [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	42	322	285	281
Unallocated [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	$ 824	0	$ 653	$ 771
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		(3,300)
Allowance for Credit Losses - Off-Balance Sheet credit Exposure		1,064
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Real Estate Loans [Member] | Residential [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		79
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Real Estate Loans [Member] | Commercial [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		(3,070)
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Real Estate Loans [Member] | Agricultural [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		(1,145)
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Real Estate Loans [Member] | Construction [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		(103)
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Consumer [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		1,040
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Other Commercial Loans [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		(328)
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Other Agricultural Loans [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		(219)
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | State and Political Subdivision Loans [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		(280)
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member] | Unallocated [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		726
As Reported [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		15,252
Allowance for Credit Losses - Off-Balance Sheet credit Exposure		1,229
As Reported [Member] | Real Estate Loans [Member] | Residential [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		1,135
As Reported [Member] | Real Estate Loans [Member] | Commercial [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		7,050
As Reported [Member] | Real Estate Loans [Member] | Agricultural [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		3,444
As Reported [Member] | Real Estate Loans [Member] | Construction [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		698
As Reported [Member] | Consumer [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		1,175
As Reported [Member] | Other Commercial Loans [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		712
As Reported [Member] | Other Agricultural Loans [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		270
As Reported [Member] | State and Political Subdivision Loans [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		42
As Reported [Member] | Unallocated [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses		$ 726

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

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