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Consolidated Statements of Comprehensive Income (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Net income (loss) $ 206,145 [1] $ (210,388) [1] $ (1,096,729)
Other Comprehensive Income, Net of Tax [Abstract]      
Change in fair value of derivatives 314 213 724
Foreign currency translation adjustments 0 0 6
Other Comprehensive Income 314 213 730
Comprehensive Income (Loss) $ 206,459 $ (210,175) $ (1,095,999)
[1] Due to rounding, the sum of quarterly results may not equal the total for the year. Additionally, quarterly and year-to-date computations of per share amounts are made independently.