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DERIVATIVE INSTRUMENTS (Details 2) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Derivative assets - gross amounts $ 9,682 $ 22,270
Derivative assets - gross amounts offset (3,823) (5,373)
Derivative assets- net amounts 5,859 16,897
Derivative liabilities - gross amounts 17,540 20,949
Derivative liabilities - gross amounts offset (3,823) (5,373)
Derivative liabilities- net amounts $ 13,717 $ 15,576