Accounts And Notes Receivable (Schedule Of Accounts And Notes Receivable) (Details) - USD ($) $ in Thousands	Aug. 31, 2016	Aug. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Royalties and other trade receivables	$ 19,994	$ 19,713
Current accounts and notes receivable, gross	36,404	32,651
Allowance for doubtful accounts and notes receivable, current	(967)	(1,074)
Current accounts and notes receivable, net	35,437	31,577
Receivables from franchisees	7,170	5,676
Receivables from system funds	5,466	1,571
Allowance for doubtful notes receivable	(74)	(31)
Noncurrent notes receivable, net	12,562	7,216
Notes Receivable From Franchisees [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current accounts and notes receivable, gross	5,531	996
Receivables From System Funds [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current accounts and notes receivable, gross	4,372	4,965
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current accounts and notes receivable, gross	$ 6,507	$ 6,977