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SUBORDINATED DEBENTURES - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended
May 31, 2020
Mar. 31, 2021
Debt Instrument [Line Items]    
Liquidation value per share   $ 1,000
Debentures mature date   30 years
Subordinated debentures | Trust II Debentures    
Debt Instrument [Line Items]    
Debenture issued   $ 3,093,000
Subordinated debentures | Trust II Debentures | Minimum    
Debt Instrument [Line Items]    
Notice period required for redemption of debentures   30 days
Subordinated debentures | Trust II Debentures | Maximum    
Debt Instrument [Line Items]    
Notice period required for redemption of debentures   60 days
Redemption price of debentures as a percentage of principal   100.00%
Subordinated debentures | Trust II Debentures | 3 Month LIBOR    
Debt Instrument [Line Items]    
Spread on variable rate   3.35%
Subordinated debentures | Trust III Debentures    
Debt Instrument [Line Items]    
Debenture issued   $ 2,062,000
Subordinated debentures | Trust III Debentures | Minimum    
Debt Instrument [Line Items]    
Notice period required for redemption of debentures   30 days
Subordinated debentures | Trust III Debentures | Maximum    
Debt Instrument [Line Items]    
Notice period required for redemption of debentures   60 days
Redemption price of debentures as a percentage of principal   100.00%
Subordinated debentures | Trust III Debentures | 3 Month LIBOR    
Debt Instrument [Line Items]    
Spread on variable rate   1.67%
Subordinated debentures | DCB Trust I Debentures    
Debt Instrument [Line Items]    
Debenture issued   $ 5,155,000
Subordinated debentures | DCB Trust I Debentures | Minimum    
Debt Instrument [Line Items]    
Notice period required for redemption of debentures   30 days
Subordinated debentures | DCB Trust I Debentures | Maximum    
Debt Instrument [Line Items]    
Notice period required for redemption of debentures   60 days
Redemption price of debentures as a percentage of principal   100.00%
Subordinated debentures | DCB Trust I Debentures | 3 Month LIBOR    
Debt Instrument [Line Items]    
Spread on variable rate   1.80%
Subordinated debentures | Other Debentures Issued in December 2015    
Debt Instrument [Line Items]    
Notice period required for redemption of debentures 30 days  
Redemption price of debentures as a percentage of principal 100.00%  
Debenture issued, par value per instrument issued $ 500,000  
Debt instrument maturity start date Nov. 01, 2020  
Debt instrument maturity end date Nov. 01, 2024  
Subordinated debentures | Other Debentures Issued in December 2015 | Directors and Related Parties    
Debt Instrument [Line Items]    
Debenture issued $ 10,000,000  
Subordinated debentures | Other Debentures Issued in December 2015 | Minimum    
Debt Instrument [Line Items]    
Stated interest rate 1.00%  
Subordinated debentures | Other Debentures Issued in December 2015 | Maximum    
Debt Instrument [Line Items]    
Stated interest rate 4.00%