ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ 962,306	$ 839,667	$ 751,443
Other comprehensive (loss) income, net	(10,865)
Less: Amounts reclassified from accumulated other comprehensive income, net	10,239
Less: Reclassification of stranded tax effect	532
Total other comprehensive income (loss), net of tax	(21,636)	33,347	(9,252)
Ending Balance	1,375,796	962,306	839,667
Gains and Losses on Derivatives
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(2,979)
Other comprehensive (loss) income, net	8,937
Less: Amounts reclassified from accumulated other comprehensive income, net	10,239
Less: Reclassification of stranded tax effect	532
Total other comprehensive income (loss), net of tax	(1,834)
Ending Balance	(4,813)	(2,979)
Defined Benefit Pension Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(93)
Other comprehensive (loss) income, net	(643)
Less: Amounts reclassified from accumulated other comprehensive income, net	0
Less: Reclassification of stranded tax effect	0
Total other comprehensive income (loss), net of tax	(643)
Ending Balance	(736)	(93)
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(20,735)
Other comprehensive (loss) income, net	(19,159)
Less: Amounts reclassified from accumulated other comprehensive income, net	0
Less: Reclassification of stranded tax effect	0
Total other comprehensive income (loss), net of tax	(19,159)
Ending Balance	(39,894)	(20,735)
Total
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(23,807)	(57,154)	(47,902)
Total other comprehensive income (loss), net of tax	(21,636)	33,347	(9,252)
Ending Balance	$ (45,443)	$ (23,807)	$ (57,154)