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Subordinated Debentures (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Dec. 31, 2019
USD ($)
installment
Apr. 30, 2013
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2008
USD ($)
installment
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2014
tranche
Sep. 30, 2014
USD ($)
Aug. 31, 2014
USD ($)
Jun. 30, 2014
USD ($)
Subordinated Borrowing [Line Items]                    
Debenture outstanding $ 40,962       $ 40,962 $ 9,239        
Repayments of debt         7,432 $ 4,069        
2008 Debentures                    
Subordinated Borrowing [Line Items]                    
Debt issued       $ 550            
Conversion ratio       0.0667            
Interest rate       6.00%            
Debenture outstanding 225       225          
Repayments of debt         119          
Number of equal principal installments | installment       8            
2011 Debentures                    
Subordinated Borrowing [Line Items]                    
Debt issued     $ 1,400              
Conversion ratio     0.0588              
Interest rate     6.00%              
Debenture outstanding $ 809       809          
Repayments of debt         116          
Number of equal principal installments | installment 8                  
2013 Debentures                    
Subordinated Borrowing [Line Items]                    
Debt issued   $ 1,400                
Conversion ratio   0.0455                
Interest rate   6.50%                
Debenture outstanding $ 870       870          
Repayments of debt         0          
2014 Debentures                    
Subordinated Borrowing [Line Items]                    
Debt issued               $ 7,000 $ 100 $ 3,000
Interest rate             7.25%      
Repayments of debt         7,100          
Number of tranches | tranche             3      
2019 Debentures                    
Subordinated Borrowing [Line Items]                    
Debt issued $ 40,000       $ 40,000          
Interest rate 5.375%