EARNINGS PER SHARE - Components of Numerator and Denominator for Computation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Net income (loss) attributable to common shareholders - Basic	$ 4,850	$ (17,237)	$ 2,840	$ 1,785
Interest on Convertible Notes	0		694	1,677
Gain on derivative liability	0	3,571	(1,581)	(12,865)
Net income (loss) attributable to common shareholders - Diluted	$ 4,850	$ (17,237)	$ 1,953	$ (9,403)
Weighted average common shares - Basic	35,651,000	32,085,000	34,269,000	32,021,000
Effective of diluted shares:
Share-based awards (shares)	370,000	0	522,000	652,000
Convertible Notes (shares)	0	0	1,459,030	3,521,126
Diluted weighted average common shares outstanding (shares)	36,021,000	32,085,000	36,250,000	36,194,000
Net income (loss) per share attributable to common shareholders - Basic (in dollars per share)	$ 0.14	$ (0.54)	$ 0.08	$ 0.06
Net income (loss) per share attributable to common shareholders - Diluted (in dollars per share)	$ 0.13	$ (0.54)	$ 0.05	$ (0.26)