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SUBORDINATED DEBENTURES - Narrative (Details)
1 Months Ended 3 Months Ended 12 Months Ended
May 31, 2017
USD ($)
Mar. 31, 2017
USD ($)
trust
$ / shares
Dec. 31, 2016
Dec. 31, 2015
USD ($)
Jul. 31, 2015
USD ($)
Subsequent Event          
Debt Instrument [Line Items]          
Repayment of subordinated debentures $ 5,000,000        
Trust Preferred Securities Subject to Mandatory Redemption          
Debt Instrument [Line Items]          
Number of trusts | trust   3      
Liquidation value per share (in USD per share) | $ / shares   $ 1,000      
Subordinated Debentures          
Debt Instrument [Line Items]          
Debenture term   30 years      
Subordinated Debentures | Debentures II          
Debt Instrument [Line Items]          
Debenture issued   $ 3,093,000      
Subordinated Debentures | Debentures II | 3 Month LIBOR          
Debt Instrument [Line Items]          
Spread on variable rate   3.35%      
Subordinated Debentures | Debentures II | Minimum          
Debt Instrument [Line Items]          
Notice period required for redemption of debentures   30 days      
Subordinated Debentures | Debentures II | 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 | Debentures III          
Debt Instrument [Line Items]          
Debenture issued   $ 2,062,000      
Subordinated Debentures | Debentures III | 3 Month LIBOR          
Debt Instrument [Line Items]          
Spread on variable rate   1.67% 1.67%    
Subordinated Debentures | Debentures III | Minimum          
Debt Instrument [Line Items]          
Notice period required for redemption of debentures   30 days      
Subordinated Debentures | Debentures III | 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 Debentures I          
Debt Instrument [Line Items]          
Debenture issued   $ 5,155,000      
Subordinated Debentures | DCB Debentures I | 3 Month LIBOR          
Debt Instrument [Line Items]          
Spread on variable rate   1.80%      
Subordinated Debentures | DCB Debentures I | Minimum          
Debt Instrument [Line Items]          
Notice period required for redemption of debentures   30 days      
Subordinated Debentures | DCB Debentures I | 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 | Other Debentures Issued in July 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         $ 4,000,000
Debenture issued, par value per instrument issued         $ 500,000
Subordinated Debentures | Other Debentures Issued in July 2015 | Minimum          
Debt Instrument [Line Items]          
Stated interest rate         2.50%
Subordinated Debentures | Other Debentures Issued in July 2015 | Maximum          
Debt Instrument [Line Items]          
Stated interest rate         4.00%
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       $ 5,000,000  
Debenture issued, par value per instrument issued       $ 500,000  
Subordinated Debentures | Other Debentures Issued in December 2015 | Minimum          
Debt Instrument [Line Items]          
Stated interest rate       3.00%  
Subordinated Debentures | Other Debentures Issued in December 2015 | Maximum          
Debt Instrument [Line Items]          
Stated interest rate       5.00%  
Directors and Related Parties | Subordinated Debentures | Other Debentures Issued in July 2015          
Debt Instrument [Line Items]          
Debenture issued         $ 3,000,000
Directors and Related Parties | Subordinated Debentures | Other Debentures Issued in December 2015          
Debt Instrument [Line Items]          
Debenture issued       $ 2,500,000