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Loans Receivable and Allowance for Loan Losses (Summary of Amount of Loans in Each Category that were Individually and Collectively Evaluated for Impairment) (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans acquired with deteriorated credit quality $ 6,814 $ 8,304
Total Loans 1,372,492 1,356,040
Purchased Credit-Impaired [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment 1,659 1,674
Loans acquired with deteriorated credit quality 6,814 8,304
Collectively evaluated for impairment 1,364,019 1,346,062
Total Loans 1,372,492 1,356,040
Residential Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Loans 276,592 273,040
Residential Real Estate Loans [Member] | Purchased Credit-Impaired [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans acquired with deteriorated credit quality 669 784
Collectively evaluated for impairment 275,923 272,256
Total Loans 276,592 273,040
Commercial Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Loans 641,581 628,724
Commercial Real Estate Loans [Member] | Purchased Credit-Impaired [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment 1,643 1,658
Loans acquired with deteriorated credit quality 2,744 3,285
Collectively evaluated for impairment 637,194 623,781
Total Loans 641,581 628,724
Agricultural Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Loans 64,153 61,925
Agricultural Real Estate Loans [Member] | Purchased Credit-Impaired [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans acquired with deteriorated credit quality 1,925 1,918
Collectively evaluated for impairment 62,228 60,007
Total Loans 64,153 61,925
Construction Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Loans 19,407 21,990
Construction Real Estate Loans [Member] | Purchased Credit-Impaired [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Collectively evaluated for impairment 19,407 21,990
Total Loans 19,407 21,990
Commercial [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Loans 183,212 186,031
Commercial [Member] | Purchased Credit-Impaired [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment 16 16
Loans acquired with deteriorated credit quality   198
Collectively evaluated for impairment 183,196 185,817
Total Loans 183,212 186,031
Other Agricultural Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Loans 36,729 37,930
Other Agricultural Loans [Member] | Purchased Credit-Impaired [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans acquired with deteriorated credit quality 1,476 2,119
Collectively evaluated for impairment 35,253 35,811
Total Loans 36,729 37,930
Consumer Loans To Individuals [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Loans 150,818 146,400
Consumer Loans To Individuals [Member] | Purchased Credit-Impaired [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Collectively evaluated for impairment 150,818 146,400
Total Loans $ 150,818 $ 146,400