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Income Taxes Reconciliations Of The United States Statutory Rates To Effective Rates From Continuing Operations (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Aug. 31, 2012
Aug. 31, 2011
Aug. 31, 2010
Income Tax Disclosure [Abstract]      
Tax expense (benefit) at statutory rate of 35% $ 56,978 $ 13,512 $ (56,486)
State and local taxes 4,620 7,351 (12,530)
Section 199 manufacturing deduction 0 (1,175) 0
Foreign rate differential (9,909) (9,617) (1,096)
Change in valuation allowance 10,033 0 12,965
Liability for non-US earnings 0 8,848 0
Disposition of CMCS (102,104) 0 0
Research and experimentation tax credits (11,500) 0 0
Other 5,692 409 (4,795)
Taxes (benefit) on continuing operations $ (46,190) $ 19,328 $ (61,942)
Effective tax rate from continuing operations (28.40%) 50.10% 38.40%