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Consolidated Statements of Stockholders' Equity (USD $)
In Thousands
Total
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income [Member]
Preferred Stock [Member]
Common Stock [Member]
Paid-in Capital [Member]
Common Stock Held in Treasury, at Cost [Member]
Noncontrolling Interest [Member]
Beginning balance at Dec. 31, 2011 $ (3,149,533) $ (6,039,922) $ 463,259    $ 3,080 $ 2,172,027 $ (411,419) $ 663,442
Total comprehensive income 235,891 253,320 (17,462)         33
Stock-based compensation (338) (338)            
Shares issued under equity plans 338           338  
Ending balance at Mar. 31, 2012 (2,913,642) (5,786,940) 445,797    3,080 2,172,027 (411,081) 663,475
Beginning balance at Dec. 31, 2012 (3,246,967) (6,297,264) 625,385    3,080 2,172,027 (410,755) 660,560
Total comprehensive income 376,897 282,299 94,686         (88)
Stock-based compensation (60) (60)            
Shares issued under equity plans 60           60  
Ending balance at Mar. 31, 2013 $ (2,870,070) $ (6,015,025) $ 720,071    $ 3,080 $ 2,172,027 $ (410,695) $ 660,472