Accounts And Notes Receivable (Details) - USD ($) $ in Thousands	May 31, 2016	Aug. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Royalties and other trade receivables	$ 20,401	$ 19,713
Current accounts and notes receivable, gross	39,169	32,651
Allowance for doubtful accounts and notes receivable, current	(1,007)	(1,074)
Accounts and notes receivable, net	38,162	31,577
Allowance for doubtful notes receivable	(33)	(31)
Notes receivable, net	9,888	7,216
Notes Receivable From Franchisees [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current accounts and notes receivable, gross	1,304	996
Noncurrent accounts and notes receivable, gross	6,069	5,676
Receivables From System Funds [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current accounts and notes receivable, gross	6,066	4,965
Noncurrent accounts and notes receivable, gross	3,852	1,571
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current accounts and notes receivable, gross	$ 11,398	$ 6,977