Accounts And Notes Receivable (Details) (USD $) In Thousands, unless otherwise specified	May 31, 2013	Aug. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Royalties and other trade receivables	$ 17,664	$ 17,030
Current accounts and notes receivable, gross	34,581	29,268
Allowance for doubtful accounts and notes receivable, current	(2,102)	(2,195)
Accounts and notes receivable, net	32,479	27,073
Notes receivable from franchisees	5,926	5,286
Notes receivable from advertising funds	6,495	7,152
Allowance for doubtful notes receivable	(808)	(797)
Notes receivable, net	11,613	11,641
Notes Receivable From Franchisees [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current accounts and notes receivable, gross	4,656	1,304
Notes Receivable From Advertising Funds [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current accounts and notes receivable, gross	7,825	4,825
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current accounts and notes receivable, gross	$ 4,436	$ 6,109