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		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Net income attributable to common shareholders - Basic	$ (17,237)	$ 2,573	$ 1,785	$ 5,507
Interest on Convertible Notes			1,677	1,667
Gain on derivative liability			(12,865)	(2,509)
Net income attributable to common shareholders - Diluted	$ (17,237)	$ 2,573	$ (9,403)	$ 4,665
Weighted average common shares - Basic	32,085	31,398	32,021	31,346
Effective of dilutive shares:
Share-based awards (shares)	0	642	652	641
Convertible Notes (shares)	0	0	3,521	3,521
Diluted weighted average common shares outstanding (shares)	32,085	32,040	36,194	35,508
Net (loss) income per share attributable to common shareholders - Basic
Net income per share attributable to common shareholders - Basic (in dollars per share)	$ (0.54)	$ 0.08	$ 0.06	$ 0.18
Net (loss) income per share attributable to common shareholders - Diluted
Net income per share attributable to common shareholders - Diluted (in dollars per share)	$ (0.54)	$ 0.08	$ (0.26)	$ 0.13