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Accrued Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Aug. 31, 2014
Aug. 31, 2013
Accrued Liabilities [Abstract]    
Wages and employee benefit costs $ 14,302 $ 14,611
Property taxes, sales and use taxes and employment taxes 9,570 9,219
Unredeemed gift cards 8,577 8,272
Dividend payable 4,852  
Other 6,380 5,119
Accrued liabilities $ 43,681 $ 37,221