Accounts And Notes Receivable (Schedule Of Accounts And Notes Receivable) (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2012	Aug. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Accounts and Notes Receivable, gross	$ 29,268	$ 27,255
Allowance for doubtful accounts and notes receivable	(2,195)	(2,697)
Current Accounts and Notes Receivable, net	27,073	24,558
Notes receivable from franchisees	5,286	6,286
Notes receivable from advertising funds	7,152	5,469
Allowance for doubtful notes receivable	(797)	(669)
Noncurrent Notes Receivable, net	11,641	11,086
Royalties And Other Trade Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Accounts and Notes Receivable, gross	17,030	17,729
Notes Receivable From Franchisees [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Accounts and Notes Receivable, gross	1,304	3,220
Notes Receivable From Advertising Funds [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Accounts and Notes Receivable, gross	4,825	1,500
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Accounts and Notes Receivable, gross	$ 6,109	$ 4,806