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Income Taxes Schedule of Income Tax Rate Reconciliation (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
US Federal Effective Tax Rate 35.00%    
Income (loss) before income taxes      
Domestic $ 125,010 $ 173,032 $ 34,946
Foreign (626,776) (48,587) (82,221)
Total income (loss) before income taxes (501,766) 124,445 (47,275)
Expected federal income tax provision (benefit) (175,618) 43,556 (16,546)
Asset impairments 207,054 0 0
Change in valuation allowance 8,518 3,195 6,553
Stock-based compensation 951 1,541 1,648
Foreign earnings (19,222) (14,986) (18,224)
Tax credits (6,877) (9,746) (23,224)
Uncertain tax positions, including interest and penalties (3,996) (10,242) 12,053
Change in tax rates (1,522) (1,428) 482
U.S. tax provision (benefit) of foreign branch income (loss) (1,156) 333 (6,262)
State income tax provision (benefit), net of federal effect (768) 1,968 (3,193)
U.S. tax provision on foreign earnings 0 279 7,932
Other, net (2,934) 1,504 (5,044)
Total provision (benefit) for income taxes $ 4,430 $ 15,974 $ (43,825)