Consolidated Statements Of Income And Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2011
Revenues:
Company Drive-In sales	$ 402,296	$ 404,443	$ 410,820
Franchise Drive-Ins:
Franchise royalties and fees	130,737	128,013	125,871
Lease revenue	4,785	6,575	6,023
Other	4,767	4,699	3,237
Total revenues	542,585	543,730	545,951
Costs and expenses:
Food and packaging	114,545	113,775	115,516
Payroll and other employee benefits	142,511	144,531	149,417
Other operating expenses, exclusive of depreciation and amortization included below	86,153	89,164	91,303
Total cost of Company Drive-In sales	343,209	347,470	356,236
Selling, general and administrative	66,022	65,173	64,943
Depreciation and amortization	40,387	41,914	41,225
Provision for impairment of long-lived assets	1,776	764	824
Other operating (income) expense, net	1,943	(531)	(585)
Total costs and expenses	453,337	454,790	462,643
Income from operations	89,248	88,940	83,308
Interest expense	29,098	31,608	32,600
Interest income	(592)	(630)	(706)
Net loss from early extinguishment of debt	4,443		23,035
Net interest expense	32,949	30,978	54,929
Income before income taxes	56,299	57,962	28,379
Provision for income taxes	19,598	21,877	9,154
Net income	36,701	36,085	19,225
Basic income per share	$ 0.65	$ 0.60	$ 0.31
Diluted income per share	$ 0.64	$ 0.60	$ 0.31
Other comprehensive income, net of tax:
Net change in deferred hedging losses, net of tax of $522			843
Comprehensive income	$ 36,701	$ 36,085	$ 20,068