EARNINGS PER COMMON SHARE - Schedule of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Numerator
Net income attributable to common stockholders	$ 69,171	$ 36,710	$ 25,749
Denominator
Basic weighted average common shares (in shares)	62,235,014	46,351,544	37,514,637
Dilutive stock options and restricted stock units (in shares)	225,225	537,987	557,289
Dilutive weighted average common shares (in shares)	62,460,239	46,889,531	38,071,926
Net income attributable to common stockholders, per:
Basic earnings per common share (in dollars per share)	$ 1.11	$ 0.79	$ 0.69
Dilutive earnings per common share (in dollars per share)	$ 1.11	$ 0.78	$ 0.68