(LOSS) INCOME PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share
Net (loss) income	$ (8,072)	$ 4,208	$ (12,800)	$ 25,546
Weighted average number of common shares	314,077	298,510	307,445	298,330
Effect of employee stock-based awards		2,535		1,665
Diluted shares outstanding	314,077	301,045	307,445	299,995
Net income (loss) per share:
Basic (in dollars per share)	$ (0.03)	$ 0.01	$ (0.04)	$ 0.09
Diluted (in dollars per share)	$ (0.03)	$ 0.01	$ (0.04)	$ 0.09
Options
Antidilutive Securities Excluded from Computation of Earnings Per Share
Options outstanding not included in the computation of diluted weighted average shares because their effect would have been anti-dilutive (in shares)	1,300		2,400
Average exercise price of options outstanding (in dollars per share)	$ 5.18		$ 4.14