EARNINGS PER SHARE - Components of Numerator and Denominator for Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Net income attributable to common shareholders - Basic	$ 19,022	$ 2,934
Interest on Convertible Notes	838	829
Gain on derivative liability	(16,436)	(2,147)
Net income attributable to common shareholders - Diluted	$ 3,424	$ 1,616
Weighted average common shares - Basic	31,956	31,294
Effective of dilutive shares:
Share-based awards (shares)	703	639
Convertible Notes (shares)	3,521	3,521
Diluted weighted average common shares outstanding (shares)	36,180	35,454
Net income per share attributable to common shareholders - Basic
Net income per share attributable to common shareholders - Basic (in dollars per share)	$ 0.60	$ 0.09
Net income per share attributable to common shareholders - Diluted
Net income per share attributable to common shareholders - Diluted (in dollars per share)	$ 0.09	$ 0.05