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DERIVATIVES (Details 3) - Non-Designated Hedges - Interest rate swaps - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Derivatives    
Notional amounts $ 147,967 $ 62,472
Weighted average pay rates (as a percent) 3.96% 3.50%
Weighted average receive rates (as a percent) 3.96% 3.50%
Weighted average maturity 12 years 4 months 13 days 13 years 11 months 19 days
Fair value of combined interest rate swaps $ 0 $ 0