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Loans and Allowance for Credit Losses on Loans - Troubled Debt and Modifications (Details)
12 Months Ended
Dec. 31, 2022
loan
Dec. 31, 2021
USD ($)
loan
item
Dec. 31, 2020
USD ($)
item
Troubled debt and modifications      
Number of troubled debt restructuring | loan 0    
Commercial and commercial real estate      
Troubled debt and modifications      
Number of troubled debt restructuring | item   1  
Commercial and commercial real estate | Modification of terms      
Troubled debt and modifications      
Recorded investment, before modification   $ 2,000,000.0  
Recorded investment, after modification   $ 2,000,000  
Residential real estate      
Troubled debt and modifications      
Number of loans in the process of foreclosure | loan 0 0  
Agricultural production and real estate      
Troubled debt and modifications      
Number of troubled debt restructuring | item     1
Agricultural production and real estate | Modification of terms      
Troubled debt and modifications      
Recorded investment, before modification     $ 180,000
Recorded investment, after modification     $ 180,000