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Loans and Allowance for Credit Losses - Troubled Debt Restructurings (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2021
USD ($)
Loans
contract
Mar. 31, 2020
contract
Dec. 31, 2020
USD ($)
Financing Receivable, Modifications [Line Items]      
Outstanding Recorded Investment $ 7,223   $ 7,908
Reserves specific to modified loans $ 590   $ 20
Number of loans | Loans 1    
Defaults on troubled debt restructurings | contract 0 0  
COVID-19 [Member] | Payment Deferral [Member]      
Financing Receivable, Modifications [Line Items]      
Outstanding Recorded Investment $ 2,800    
Commercial Real Estate | Commercial real estate      
Financing Receivable, Modifications [Line Items]      
Outstanding Recorded Investment $ 325    
Number of loans | Loans 1    
Pre-Modification Outstanding Recorded Investment $ 333    
Principal Modification 0    
Post Modification Outstanding Recorded Investment 333    
Commercial Real Estate | Commercial and industrial      
Financing Receivable, Modifications [Line Items]      
Outstanding Recorded Investment $ 12,125    
Number of loans | Loans 1    
Pre-Modification Outstanding Recorded Investment $ 12,925    
Principal Modification 0    
Post Modification Outstanding Recorded Investment 12,925    
Commercial Real Estate | Agricultural production      
Financing Receivable, Modifications [Line Items]      
Outstanding Recorded Investment $ 850    
Number of loans | Loans 1    
Pre-Modification Outstanding Recorded Investment $ 850    
Principal Modification 0    
Post Modification Outstanding Recorded Investment 850    
Commercial and Real Estate      
Financing Receivable, Modifications [Line Items]      
Outstanding Recorded Investment $ 12,975    
Number of loans | Loans 2    
Pre-Modification Outstanding Recorded Investment $ 13,775    
Principal Modification 0    
Post Modification Outstanding Recorded Investment $ 13,775