RESTRUCTURING CHARGES - Schedule of Restructuring Activities (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 costs
Employee compensation costs	$ 400			$ 434	$ 14,993	$ 3,875
Fixed Asset disposals and accelerated depreciation of leasehold improvements	3,511			0	3,511	0
Other exit costs	0			0	238	0
Total restructuring costs	$ 3,911	$ 5,814	$ 9,017	$ 434	$ 18,742	$ 3,875	$ 31,900