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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
Jun. 30, 2023
Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment $ 490 $ 463
Loans acquired with deteriorated credit quality   6,290
Collectively evaluated for impairment 1,577,493 1,467,671
Total 1,577,983 1,474,424
Residential Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans acquired with deteriorated credit quality   567
Collectively evaluated for impairment 307,462 298,246
Total 307,462 298,813
Commercial Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment 423 402
Loans acquired with deteriorated credit quality   2,049
Collectively evaluated for impairment 669,930 649,093
Total 670,353 651,544
Agricultural Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans acquired with deteriorated credit quality   2,034
Collectively evaluated for impairment 67,729 66,881
Total 67,729 68,915
Construction Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Collectively evaluated for impairment 38,245 32,469
Total 38,245 32,469
Commercial Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment 67 61
Loans acquired with deteriorated credit quality   1,640
Collectively evaluated for impairment 211,647 185,556
Total 211,714 187,257
Other Agricultural Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Collectively evaluated for impairment 34,722 35,277
Total 34,722 35,277
Consumer Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Collectively evaluated for impairment 247,758 200,149
Total $ 247,758 $ 200,149