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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
Sep. 30, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment $ 12 $ 1,674
Loans acquired with deteriorated credit quality 6,614 8,304
Collectively evaluated for impairment 1,426,241 1,346,062
Total Loans 1,432,867 1,356,040
Purchased Credit-Impaired [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Loans   8,304
Residential Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans acquired with deteriorated credit quality 571 784
Collectively evaluated for impairment 294,554 272,256
Total Loans 295,125 273,040
Residential Real Estate Loans [Member] | Purchased Credit-Impaired [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Loans   784
Commercial Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment   1,658
Loans acquired with deteriorated credit quality 2,284 3,285
Collectively evaluated for impairment 642,323 623,781
Total Loans 644,607 628,724
Commercial Real Estate Loans [Member] | Purchased Credit-Impaired [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Loans   3,285
Agricultural Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans acquired with deteriorated credit quality 2,336 1,918
Collectively evaluated for impairment 67,020 60,007
Total Loans 69,356 61,925
Agricultural Real Estate Loans [Member] | Purchased Credit-Impaired [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Loans   1,918
Construction Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Collectively evaluated for impairment 26,637 21,990
Total Loans 26,637 21,990
Commercial [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment 12 16
Loans acquired with deteriorated credit quality   198
Collectively evaluated for impairment 184,717 185,817
Total Loans 184,729 186,031
Commercial [Member] | Purchased Credit-Impaired [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Loans   198
Other Agricultural Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans acquired with deteriorated credit quality 1,423 2,119
Collectively evaluated for impairment 34,310 35,811
Total Loans 35,733 37,930
Other Agricultural Loans [Member] | Purchased Credit-Impaired [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Loans   2,119
Consumer Loans To Individuals [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Collectively evaluated for impairment 176,680 146,400
Total Loans $ 176,680 $ 146,400