Accounts And Notes Receivable (Schedule Of Accounts And Notes Receivable) (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Royalties and other trade receivables	$ 18,292	$ 16,506
Current accounts and notes receivable, gross	34,425	30,689
Allowance for doubtful accounts and notes receivable, current	(1,592)	(1,547)
Current Accounts and Notes Receivable, net	32,833	29,142
Receivables from franchisees	4,688	5,003
Receivables from advertising funds	3,646	5,810
Allowance for doubtful notes receivable	(179)	(800)
Notes receivable, net	8,155	10,013
Notes Receivable From Franchisees [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current accounts and notes receivable, gross	1,468	4,003
Receivable From Advertising Funds [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current accounts and notes receivable, gross	5,597	5,203
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current accounts and notes receivable, gross	$ 9,068	$ 4,977