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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Aug. 31, 2011
Summary of Significant Accounting Policies [Abstract] 
Estimated useful lives of property, plant and equipment
     
Buildings
  7 to 40 years
Land improvements
  3 to 25 years
Leasehold improvements
  3 to 15 years
Equipment
  3 to 25 years
Accumulated other comprehensive income (loss)
                 
(in thousands)   2011   2010
 
Foreign currency translation adjustment
  $ 58,937     $ (14,050 )
Unrealized gain on derivatives
    4,677       4,872  
Defined benefit obligations
    (4,141 )     (3,348 )
 
Total
  $ 59,473     $ (12,526 )