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Junior Subordinated Debt - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Sep. 21, 2006
Junior Subordinated Notes [Abstract]      
Frequency of repricing 3 months    
Junior subordinated debt $ 4,124 $ 4,124  
Floating Rate Capital Securities [Member] | LIBOR [Member]      
Junior Subordinated Notes [Abstract]      
Basis spread on variable rate 1.70%    
Term of variable rate 3 months    
Floating Rate Junior Subordinated Deferrable Interest Debentures due 2036 [Member]      
Junior Subordinated Notes [Abstract]      
Face amount $ 4,000    
Maturity date Dec. 31, 2036    
Wholly-Owned Connecticut Statutory Business Trust [Member] | Floating Rate Capital Securities [Member]      
Junior Subordinated Notes [Abstract]      
Face amount     $ 4,000