EARNINGS PER COMMON SHARE - Schedule of the Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Numerator
Net income attributable to common stockholders	$ 15,500	$ 14,643	$ 46,664	$ 17,020
Denominator
Basic weighted average common shares (in shares)	65,160,290	47,359,949	61,244,991	43,358,620
Dilutive restricted stock units (in shares)	237,885	517,253	223,612	481,930
Diluted weighted average common shares (in shares)	65,398,175	47,877,202	61,468,603	43,840,550
Net income attributable to common stockholders, per:
Basic common share (in dollars per share)	$ 0.24	$ 0.31	$ 0.76	$ 0.39
Diluted common share (in dollars per share)	$ 0.24	$ 0.31	$ 0.76	$ 0.39