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		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Numerator
Net income attributable to common stockholders	$ 34,915	$ 14,275	$ 16,643	$ 31,164
Denominator
Basic weighted average common shares (in shares)	65,303,057	59,323,799	65,274,845	59,254,895
Dilutive restricted stock units (in shares)	200,326	219,982	179,492	255,269
Diluted weighted average common shares (in shares)	65,503,383	59,543,781	65,454,337	59,510,164
Net income attributable to common stockholders, per:
Basic common share (in dollars per share)	$ 0.53	$ 0.24	$ 0.25	$ 0.53
Diluted common share (in dollars per share)	$ 0.53	$ 0.24	$ 0.25	$ 0.52