Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Revenues:
Company Drive-In sales	$ 81,848	$ 83,706	$ 175,347	$ 177,162
Franchise Drive-Ins:
Franchise royalties and fees	26,582	25,996	57,803	55,916
Lease revenue	715	949	1,601	2,435
Other	596	490	1,642	1,636
Total revenues	109,741	111,141	236,393	237,149
Costs and expenses:
Food and packaging	23,043	23,546	49,279	50,178
Payroll and other employee benefits	30,031	31,448	63,371	64,913
Other operating expenses, exclusive of depreciation and amortization included below	18,437	18,811	40,244	40,787
Total cost of Company Drive-In sales	71,511	73,805	152,894	155,878
Selling, general and administrative	15,886	15,467	32,891	31,597
Depreciation and amortization	10,031	10,069	20,065	20,664
Other operating income, net	(36)	(218)	(165)	(211)
Total costs and expenses	97,392	99,123	205,685	207,928
Income from operations	12,349	12,018	30,708	29,221
Interest expense	6,384	7,448	12,767	15,123
Interest income	(144)	(168)	(261)	(309)
Loss from early extinguishment of debt		492		492
Net interest expense	6,240	7,772	12,506	15,306
Income before income taxes	6,109	4,246	18,202	13,915
Provision for income taxes	2,002	669	5,887	4,205
Net income	$ 4,107	$ 3,577	$ 12,315	$ 9,710
Basic income per share	$ 0.07	$ 0.06	$ 0.22	$ 0.17
Diluted income per share	$ 0.07	$ 0.06	$ 0.21	$ 0.17