Annual report pursuant to Section 13 and 15(d)

Discontinued Operations - Additional Information (Detail)

v2.4.0.6
Discontinued Operations - Additional Information (Detail) (USD $)
3 Months Ended 12 Months Ended
Feb. 28, 2010
Aug. 31, 2011
Aug. 31, 2010
Discontinued Operations [Line Items]      
Proceeds from sale of businesses, net of transaction costs $ 7,500,000 $ 3,463,000 $ 7,516,000
pre-tax gain (loss) on disposal of business 334,000 (15,829,000) 334,000
Loss on disposal of business, future lease payments   $ 11,400,000