EARNINGS PER SHARE - Net Income and Weighted Average Shares Outstanding (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Weighted average shares outstanding:
Basic (in shares)	72,871,990	59,596,889
Diluted (in shares)	109,334,847	59,596,889
Class A common stock
Earnings Per Share
Net income (loss) attributable to Class A common shareholders	$ 13,470	$ (5,539)
Diluted Net income (loss) available for Class A common shareholders	$ 19,280	$ (5,539)
Weighted average shares outstanding:
Basic (in shares)	72,871,990	59,596,889
Diluted (in shares)	109,334,847	59,596,889