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Income Tax (Reconciliation Of Federal Statutory Rate To Effective Tax Rate From Continuing Operations) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Aug. 31, 2013
Aug. 31, 2012
Aug. 31, 2011
Reconciliation Of Statutory Federal Tax Rate [Line Items]      
Tax expense (benefit) at statutory rate of 35% $ 46,528 $ 57,675 $ 9,146
State and local taxes 3,460 4,596 6,958
Section 199 manufacturing deduction 0 0 (1,105)
Foreign rate differential (3,295) (9,909) (9,617)
Change in valuation allowance 14,264 10,033 0
Liability for non-US earnings 0 0 8,848
Disposition of CMCS 6,292 (102,104) 0
Australian reorganization (7,245) 0 0
Research and experimentation tax credits 0 (11,500) 0
Other (2,025) 5,447 362
Tax expense (benefit) on continuing operations $ 57,979 $ (45,762) $ 14,592
Effective tax rates from continuing operations 43.60% (27.80%) 55.80%