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Transactions with Executive Officers, Directors, and Principal Shareholders - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Related Party Transaction [Line Items]      
Percentage of gross revenue 5.00%    
Percentage of aggregate amount of consolidated assets 5.00%    
Director      
Related Party Transaction [Line Items]      
Related party deposits $ 8,000 $ 9,800  
Minimum      
Related Party Transaction [Line Items]      
Percentage of participation in equity 10.00%    
Letter of Credit | Affiliated Entity      
Related Party Transaction [Line Items]      
Outstanding commitment $ 25 $ 500 $ 500