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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Statement of Financial Position [Abstract]    
Allowance for loan loss $ 18,829 $ 10,942
Subordinated notes interest rate 6.25%  
Common stock, par value (in dollars per share) $ 0.01  
Common stock, authorized (in shares) 15,000,000  
Common stock, issued (in shares) 5,911,940 5,900,249