SHARE-BASED COMPENSATION - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	$ 2,841		$ 3,698
Carry Unit Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value (in dollars per unit)	$ 3.80		$ 3.80		$ 1.95
Share based compensation expense	$ 7,214	$ 7,510	$ 21,548	$ 33,004
2017 LTIP | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	$ 8,780	$ 4,817	$ 23,914	$ 13,172