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Commitments and Contingencies - Narrative (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Loss Contingencies [Line Items]    
Charge Offs $ 430  
Allowance for unfunded commitments 137 $ 567
Unused loan commitments 194,327  
Financial Standby Letter of Credit    
Loss Contingencies [Line Items]    
Letters of credit 12,061  
Stand by Letters Of Credit Member    
Loss Contingencies [Line Items]    
Letters of credit $ 235