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Basis of Presentation, Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	$ 21,695	$ 22,797	$ 21,153	$ 21,455	$ 21,652	$ 18,552
Allowance for Credit Losses - Off-Balance Sheet credit Exposure	766	1,066	1,265	1,265	1,391	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	1,986	2,355	2,354	2,565	2,675	1,056
Real Estate Loans [Member] | Commercial [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	9,287	10,283	9,178	9,185	9,274	10,120
Real Estate Loans [Member] | Agricultural [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	3,815	3,770	3,264	3,475	3,579	4,589
Real Estate Loans [Member] | Construction [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	1,471	1,627	1,950	1,833	1,667	801
Consumer [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	1,367	1,211	1,496	1,720	1,259	135
Other Commercial Loans [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	1,824	3,256	2,229	2,072	2,477	1,040
Other Agricultural Loans [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	116	206	270	229	268	489
State and Political Subdivision Loans [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	63	63	45	48	52	322
Unallocated [Member]
Impact of Change from Incurred Loss Model to Current Expected Credit Loss Model [Abstract]
Allowance for Credit Losses	$ 1,766	$ 26	$ 367	$ 328	$ 401	0
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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