RESTRUCTURING CHARGES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		10 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring and related liabilities payables	$ 1,800				$ 1,800		$ 1,800
Restructuring charges	3,911	$ 5,814	$ 9,017	$ 434	18,742	$ 3,875	31,900
Minimum
Restructuring Cost and Reserve [Line Items]
Estimated additional restructuring and related expenses	1,500				1,500		1,500
Maximum
Restructuring Cost and Reserve [Line Items]
Estimated additional restructuring and related expenses	$ 3,000				$ 3,000		$ 3,000