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Goodwill and Other Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Aug. 31, 2012
Aug. 31, 2011
Changes in the carrying amounts of goodwill by segment    
Balance, beginning $ 95,452 $ 95,235
Translation adjustments (134) 217
Balance, ending 95,318 95,452
Americas [Member]
   
Changes in the carrying amounts of goodwill by segment    
Balance, beginning 85,578 85,546
Translation adjustments (20) 32
Balance, ending 85,558 85,578
Europe [Member]
   
Changes in the carrying amounts of goodwill by segment    
Balance, beginning 8,663 8,479
Translation adjustments (114) 184
Balance, ending 8,549 8,663
Asia-Pacific [Member]
   
Changes in the carrying amounts of goodwill by segment    
Balance, beginning 1,211 1,210
Translation adjustments 0 1
Balance, ending $ 1,211 $ 1,211