DERIVATIVES AND HEDGING ACTIVITIES (Effective of Contracts on Statement of Operations) (Details) - Realized (Gains)/Losses Reclassified from Accumulated Other Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivatives designated as hedging instruments | Operating income
Summary of Derivative Instruments Impact on Results of Operations [Abstract]
Gain (loss) on derivatives	$ 1,976	$ 328	$ 5,791	$ 489
Derivatives designated as hedging instruments | Other income (loss)
Summary of Derivative Instruments Impact on Results of Operations [Abstract]
Gain (loss) on derivatives	0	0	0	0
Derivatives not designated as hedging instruments | Operating income
Summary of Derivative Instruments Impact on Results of Operations [Abstract]
Gain (loss) on derivatives	0	0	0	0
Derivatives not designated as hedging instruments | Other income (loss)
Summary of Derivative Instruments Impact on Results of Operations [Abstract]
Gain (loss) on derivatives	$ (538)	$ 715	$ 2,767	$ 1,258