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LOSS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
LOSS PER SHARE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss for the year | $ (11,343) | $ 3,264 | $ (128,681) | $ (10,982) | $ (26,285) | $ (2,654) | $ (20,364) | $ (17,351) | $ (16,304) | $ (23,680) | $ (13,154) | $ (8,734) | $ (147,742) | $ (66,654) | $ (61,872)
Weighted average number of common shares | 297,159,000 | 297,125,000 | 297,097,000 | 296,778,000 |  |  |  |  |  |  |  |  | 297,041,000 | 261,223,000 | 147,692,000
Loss per common share (in dollars per share) | $ (0.04) | $ 0.01 | $ (0.43) | $ (0.04) |  |  |  |  |  |  |  |  | $ (0.50) | $ (0.26) | $ (0.42)
Options |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average exercise price of options outstanding (in dollars per share) | $ 5.04 |  |  |  | $ 6.32 |  |  |  | $ 7.15 |  |  |  | $ 5.04 | $ 6.32 | $ 7.15
Options outstanding not included in the computation of diluted weighted average shares because their effect would have been anti-dilutive (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 2,100,000 | 1,600,000 | 1,100,000
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) |  |  |  |  |  |  |  |  |  |  |  |  | 3,600,000 | 2,900,000 | 5,000,000

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