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Other Borrowings - Credit Facilities (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Line of Credit Facility [Line Items]    
Credit facility, maximum borrowing capacity $ 215,000,000.0  
Federal Reserve Bank Advances    
Line of Credit Facility [Line Items]    
Credit facility, maximum borrowing capacity 54,300,000  
Borrowings outstanding on credit facility 0 $ 0
PPPLF Facility [Member]    
Line of Credit Facility [Line Items]    
Borrowings outstanding on credit facility $ 0