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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, 2023
Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment $ 355 $ 463
Loans acquired with deteriorated credit quality   6,290
Collectively evaluated for impairment 1,535,682 1,467,671
Total 1,536,037 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 301,711 298,246
Total 301,711 298,813
Commercial Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment 290 402
Loans acquired with deteriorated credit quality   2,049
Collectively evaluated for impairment 668,096 649,093
Total 668,386 651,544
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 68,381 66,881
Total 68,381 68,915
Construction Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Collectively evaluated for impairment 32,391 32,469
Total 32,391 32,469
Commercial Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment 65 61
Loans acquired with deteriorated credit quality   1,640
Collectively evaluated for impairment 207,823 185,556
Total 207,888 187,257
Other Agricultural Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Collectively evaluated for impairment 34,033 35,277
Total 34,033 35,277
Consumer Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Collectively evaluated for impairment 223,247 200,149
Total $ 223,247 $ 200,149