REVENUES FROM CONTRACTS WITH CUSTOMERS - Impact of Adoption on Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Operations
Total revenue, net	$ 383,315	$ 365,854	$ 366,190	$ 357,082	$ 368,602	$ 278,834	$ 282,164	$ 258,636	$ 1,472,441	$ 1,188,236	$ 992,075
Cost of goods sold									571,496	435,511	349,089
Income tax benefit									(3,398)	(53,358)	15,842
Net income	$ 25,138	$ 13,295	$ 11,376	$ 10,992	$ 44,355	$ 3,159	$ 10,835	$ 6,394	60,801	$ 64,743	$ 74,564
Excluding Impact of Topic 606
Statement of Operations
Total revenue, net									1,468,075
Cost of goods sold									570,028
Income tax benefit									(4,119)
Net income									$ 58,624