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Borrowing Arrangements - Subordinated Debt (Details) - USD ($)
3 Months Ended
May 26, 2017
Dec. 31, 2019
Dec. 19, 2019
Dec. 31, 2018
Principal amount $ 40,000,000      
Fixed interest rate (as a percent) 5.25%      
Subordinated Debt.   $ 39,554,000   $ 39,369,000
Debt Issuance Costs   $ 446,000    
Presidio bank        
Fixed interest rate (as a percent)   8.00%    
Subordinated Debt.   $ 10,000,000 $ 10,000,000  
Pre-payment penalty   $ 300,000    
LIBOR        
Rate of interest added to base rate 336.50%