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LOSS PER SHARE (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
LOSS PER SHARE        
Net income (loss) $ (14,116) $ (104,022) $ (8,095) $ (86,135)
Weighted average number of common shares 300,530 297,164 300,364 297,162
Loss per common share $ (0.05) $ (0.35) $ (0.03) $ (0.29)
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) 4,400   4,400  
Average exercise price of options outstanding (in dollars per share) $ 3.36   $ 3.49  
Other 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) 50 900 80 1,100