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Loans, Allowance for Credit Losses - Loans and Amortized Cost Basis of Loans Under CECL Methodology (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]        
Collectively evaluated $ 14,761 $ 102    
Individually evaluated 489 18,450    
Total Allowance for Credit Losses - Loans 15,250 18,552 $ 17,556 $ 17,304
Collectively evaluated 1,708,356 1,709,724    
Individually evaluated 15,119 11,969    
Loans acquired with deteriorated credit quality   3,306    
Total Loans 1,723,475 1,724,999    
Residential [Member]        
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]        
Total Loans 166,403      
Commercial [Member]        
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]        
Total Loans 878,972      
Construction [Member]        
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]        
Total Loans 75,745      
Real Estate Loans [Member] | Residential [Member]        
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]        
Collectively evaluated 1,169 4    
Individually evaluated 26 1,052    
Total Allowance for Credit Losses - Loans 1,195 1,056 1,070 1,147
Collectively evaluated 212,535 209,869    
Individually evaluated 258 335    
Loans acquired with deteriorated credit quality   9    
Total Loans 212,793 210,213    
Real Estate Loans [Member] | Commercial [Member]        
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]        
Collectively evaluated 6,576 57    
Individually evaluated 171 10,063    
Total Allowance for Credit Losses - Loans 6,747 10,120 8,394 8,099
Collectively evaluated 872,802 869,038    
Individually evaluated 6,170 5,675    
Loans acquired with deteriorated credit quality   1,856    
Total Loans 878,972 876,569    
Real Estate Loans [Member] | Agricultural [Member]        
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]        
Collectively evaluated 3,385 24    
Individually evaluated 24 4,565    
Total Allowance for Credit Losses - Loans 3,409 4,589 4,516 4,729
Collectively evaluated 308,476 306,793    
Individually evaluated 4,317 5,380    
Loans acquired with deteriorated credit quality   1,441    
Total Loans 312,793 313,614    
Real Estate Loans [Member] | Construction [Member]        
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]        
Collectively evaluated 594 0    
Individually evaluated 257 801    
Total Allowance for Credit Losses - Loans 851 801 497 434
Collectively evaluated 73,388 80,691    
Individually evaluated 2,357 0    
Loans acquired with deteriorated credit quality   0    
Total Loans 75,745 80,691    
Consumer [Member]        
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]        
Collectively evaluated 1,216 4    
Individually evaluated 4 131    
Total Allowance for Credit Losses - Loans 1,220 135 210 262
Collectively evaluated 87,097 86,646    
Individually evaluated 4 4    
Loans acquired with deteriorated credit quality   0    
Total Loans 87,101 86,650    
Other Commercial Loans [Member]        
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]        
Collectively evaluated 705 13    
Individually evaluated 7 1,027    
Total Allowance for Credit Losses - Loans 712 1,040 1,380 1,023
Collectively evaluated 62,453 63,120    
Individually evaluated 1,680 102    
Loans acquired with deteriorated credit quality   0    
Total Loans 64,133 63,222    
Other Commercial Loans [Member] | Construction [Member]        
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]        
Total Loans 64,133      
Other Agricultural Loans [Member]        
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]        
Collectively evaluated 250 0    
Individually evaluated 0 489    
Total Allowance for Credit Losses - Loans 250 489 551 558
Collectively evaluated 31,719 34,359    
Individually evaluated 333 473    
Loans acquired with deteriorated credit quality   0    
Total Loans 32,052 34,832    
State and Political Subdivision Loans [Member]        
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]        
Collectively evaluated 42 0    
Individually evaluated 0 322    
Total Allowance for Credit Losses - Loans 42 322 285 281
Collectively evaluated 59,886 59,208    
Individually evaluated 0 0    
Loans acquired with deteriorated credit quality   0    
Total Loans 59,886 59,208    
Unallocated [Member]        
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]        
Collectively evaluated 824      
Individually evaluated 0      
Total Allowance for Credit Losses - Loans 824 $ 0 $ 653 $ 771
Collectively evaluated 0      
Individually evaluated 0      
Total Loans $ 0