Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations - Additional Information (Detail)

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Discontinued Operations - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
May 31, 2011
May 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Proceeds from sale of businesses, net of transaction costs   $ 3,463
Loss on disposal of business $ (2,086) $ (15,829)