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Borrowings, Long-term Debt (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Nov. 27, 2020
Apr. 02, 2007
Mar. 30, 2007
Aug. 31, 2019
May 31, 2017
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Long-term debt [Abstract]                
Gain on repurchase of debt instrument           $ (0) $ 219 $ (0)
Junior Subordinated Debentures [Member]                
Long-term debt [Abstract]                
Issuance of debt     $ 61,300          
Long-term debt           $ 57,841 $ 57,841  
Interest rate on junior subordinated debentures 1.82%   6.52%          
Maturity date of junior subordinated debentures           Jun. 01, 2037    
Maturity period of debentures           30 years    
Period after which debentures are redeemable           5 years    
Repayment of debt   $ 61,300            
Debt instrument, repurchased face amount       $ 1,500 $ 2,000      
Debt instrument, purchase price       1,300 1,400      
Gain on repurchase of debt instrument       $ 200 $ 600      
Junior Subordinated Debentures [Member] | LIBOR Rate [Member]                
Long-term debt [Abstract]                
Term of variable rate           3 months    
Basis spread on variable rate 1.59%   1.59%          
Reference rate 0.23%              
Junior Subordinated Debentures [Member] | Subordinated Debentures 9.0% [Member]                
Long-term debt [Abstract]                
Interest rate on junior subordinated debentures   9.00%            
Junior Subordinated Debentures [Member] | Subordinated Debentures 8.25% [Member]                
Long-term debt [Abstract]                
Interest rate on junior subordinated debentures   8.25%            
Unconsolidated Delaware Statutory Trust Subsidiary [Member]                
Long-term debt [Abstract]                
Issuance of capital securities in a private placement     $ 59,500