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Subordinated Debentures Issued to Capital Trust - Additional information (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Nov. 30, 2006
Dec. 31, 2020
Dec. 31, 2019
Subordinated Borrowing [Line Items]      
Subordinated debentures issued to capital trust   $ 25,774 $ 25,774
Subordinated Debentures      
Subordinated Borrowing [Line Items]      
Aggregate liquidation amount $ 25,000    
Interest rate 6.98% 1.81% 3.51%
90-day LIBOR | Subordinated Debentures      
Subordinated Borrowing [Line Items]      
Spread on variable rate 1.60%