RESTRUCTURING - ROLLFORWARD (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		7 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018
Accrued restructuring and severance costs rollforward
Balance at beginning of period	$ 6,820	$ 9,483		$ 9,483
Net accruals	5,814	9,017	$ 3,441	14,831	$ 3,441	$ 24,400
Non-cash additions/(reductions)	(2,300)	(258)
Cash paid	(4,834)	(11,422)
Balance at end of period	5,500	6,820		5,500		5,500
Restructuring and related liabilities payables	5,500			5,500		5,500
Restructuring Charges	5,814	9,017	$ 3,441	14,831	$ 3,441	24,400
Minimum
Accrued restructuring and severance costs rollforward
Estimated additional restructuring and related expenses	5,000			5,000		5,000
Maximum
Accrued restructuring and severance costs rollforward
Estimated additional restructuring and related expenses	7,000			7,000		7,000
Employee compensation costs
Accrued restructuring and severance costs rollforward
Balance at beginning of period	6,820	9,483		9,483
Net accruals	5,814	8,779
Non-cash additions/(reductions)	(2,300)	(258)
Cash paid	(4,834)	(11,184)
Balance at end of period	5,500	6,820		$ 5,500		$ 5,500
Restructuring Charges	$ 5,814	8,779
Other exit costs
Accrued restructuring and severance costs rollforward
Net accruals		238
Cash paid		(238)
Restructuring Charges		$ 238