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Long-term Borrowings (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]    
Percentage of entity's assets equal to line of credit facility (in hundredths) 30.00%  
Collateral pledged under blanket floating lien agreement $ 846,767,000  
Advance Amount 0 $ 0
Debt Instrument [Line Items]    
Public deposit accounts 256,984,000  
Federal Home Loan Bank Advances    
Debt Instrument [Line Items]    
Collateral for deposits 170,000,000  
US government and agency securities    
Debt Instrument [Line Items]    
Collateral for deposits $ 126,814,000