RESTRUCTURING, ACQUISITION, INTEGRATION, AND OTHER EXPENSE, NET (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Change in fair value of contingent consideration	$ 0	$ (4,597)	$ (30)
Total restructuring, acquisition, integration, and other expenses, net	12,662	15,859	24,405
Financial Improvement Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and other expense	12,134	10,334	22,635
Acquisition and integration expenses	528	10,122	1,740
Change in fair value of contingent consideration	0	(4,597)	30
Total restructuring, acquisition, integration, and other expenses, net	$ 12,662	$ 15,859	$ 24,405