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DERIVATIVES (Details 2) - Derivative designated as a cash flow hedge - Interest rate swaps related to FHLB advances - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]    
Notional Amount $ 290,000 $ 290,000
Fair Value Asset 5,747 3,133
Fair Value Liability $ (131) $ (410)