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, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Numerator
Net income attributable to common stockholders	$ 14,275	$ 12,241	$ 31,164	$ 2,377
Denominator
Basic weighted average common shares (in shares)	59,323,799	43,655,292	59,254,895	41,324,795
Dilutive restricted stock units (in shares)	219,982	441,005	255,269	466,675
Diluted weighted average common shares (in shares)	59,543,781	44,096,297	59,510,164	41,791,470
Net income attributable to common stockholders, per:
Basic common share (in dollars per share)	$ 0.24	$ 0.28	$ 0.53	$ 0.06
Diluted common share (in dollars per share)	$ 0.24	$ 0.28	$ 0.52	$ 0.06