DISCONTINUED OPERATIONS - Statement of operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Discontinued operations unaudited condensed consolidated statement of operations
Interest expense											$ 0
(Loss) income from discontinued operations	$ (2,871)	$ (309)	$ (1,309)	$ (120,574)	$ 3,496	$ 847	$ 1,388	$ 1,253	$ (125,063)	$ 6,984	104,615
Sale | MSLO
Discontinued operations unaudited condensed consolidated statement of operations
Net revenue									18,771	42,665	42,684
Operating expenses									16,481	27,544	25,691
Impairment charges				$ 161,200					161,224
Loss on sale of MSLO									4,273
(Loss) income from operations									(163,207)	15,121	16,993
Other expense (income)									485
Other expense (income)											(401)
Interest expense									3,570	6,888	891
(Loss) income from discontinued operations before income taxes									(167,262)	8,233	16,503
(Benefit from) provision for income taxes									(42,199)	1,249	(88,112)
(Loss) income from discontinued operations									$ (125,063)	$ 6,984	$ 104,615