EARNINGS PER SHARE - Schedule of Calculation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator:
Net income (loss) attributable to Class A common shareholders	$ 27,608	$ 3,313	$ 24,871	$ 46,698
Denominator:
Weighted average number of shares of Class A common stock outstanding (in shares)	62,148,362	52,922,487	60,976,046	51,091,977
Basic net income (loss) per share of Class A common stock	$ 0.44	$ 0.06	$ 0.41	$ 0.91
Numerator:
Net income (loss) attributable to Class A common shareholders	$ 27,608	$ 3,313	$ 24,871	$ 46,698
Denominator:
Weighted average number of shares of Class A common stock outstanding (in shares)	62,148,362	52,922,487	60,976,046	51,091,977
Diluted weighted average number of shares of Class A common stock outstanding (in shares)	63,347,690	53,348,858	61,875,010	51,388,851
Diluted net income per share of Class A common stock (in dollars per share)	$ 0.44	$ 0.06	$ 0.40	$ 0.91
Class A common stock
Numerator:
Net income (loss) attributable to Class A common shareholders	$ 27,608	$ 3,313	$ 24,871	$ 46,698
Denominator:
Weighted average number of shares of Class A common stock outstanding (in shares)	62,148,362	52,922,487	60,976,046	51,091,977
Basic net income (loss) per share of Class A common stock	$ 0.44	$ 0.06	$ 0.41	$ 0.91
Numerator:
Net income (loss) attributable to Class A common shareholders	$ 27,608	$ 3,313	$ 24,871	$ 46,698
Diluted Net income (loss) available for Class A common shareholders	$ 27,608	$ 3,313	$ 24,871	$ 46,698
Denominator:
Weighted average number of shares of Class A common stock outstanding (in shares)	62,148,362	52,922,487	60,976,046	51,091,977
Incremental shares of unvested Class A restricted stock (in shares)	1,199,328	426,371	898,964	296,874
Diluted weighted average number of shares of Class A common stock outstanding (in shares)	63,347,690	53,348,858	61,875,010	51,388,851
Diluted net income per share of Class A common stock (in dollars per share)	$ 0.44	$ 0.06	$ 0.40	$ 0.91