ACCUMULATED OTHER COMPREHENSIVE LOSS (Summary of Amounts Reclassified Out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Reclassifications out of accumulated other comprehensive income (loss)
Interest expense	$ (24,203)	$ (18,903)	$ (47,529)	$ (35,512)
Provision for (benefit from) income taxes	4,473	(2,417)	15,489	(1,859)
Net income	(13,328)	5,879	(45,253)	4,045
Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of accumulated other comprehensive income (loss)
Net income	(92)	(652)	(220)	(868)
(Gains) losses on cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of accumulated other comprehensive income (loss)
Interest expense	(116)	(825)	(278)	(1,099)
(Gains) losses on cash flow hedges | Interest rate swap contracts | Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of accumulated other comprehensive income (loss)
Provision for (benefit from) income taxes	$ 24	$ 173	$ 58	$ 231