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DERIVATIVE FINANCIAL INSTRUMENTS - Schedule of Interest Rate Swaps (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
LIBOR | Subordinated Debentures | Trust III Debentures    
Derivative [Line Items]    
Receive Rate 1.67% 1.67%
LIBOR | Subordinated Debentures | Trust II Debentures    
Derivative [Line Items]    
Receive Rate 3.35%  
Designated as Hedging Instrument | LIBOR | Trust II Debentures    
Derivative [Line Items]    
Receive Rate 3.35% 3.35%
Designated as Hedging Instrument | Interest Rate Swap, 3 month LIBOR plus 1.67%    
Derivative [Line Items]    
Unrealized Losses $ 340,000 $ 342,000
Designated as Hedging Instrument | Interest Rate Swap, 3 month LIBOR plus 3.35%    
Derivative [Line Items]    
Unrealized Losses 326,000 353,000
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swap, 3 month LIBOR plus 1.67%    
Derivative [Line Items]    
Notional Amount $ 2,000,000 $ 2,000,000
Pay Rate 5.979% 5.979%
Maturity in Years 8 years 6 months 4 days 9 years 3 months
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swap, 3 month LIBOR plus 3.35%    
Derivative [Line Items]    
Notional Amount $ 3,000,000 $ 3,000,000
Pay Rate 7.505% 7.505%
Maturity in Years 5 years 29 days 5 years 9 months 29 days