Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Nov. 30, 2011	Nov. 30, 2010
Revenues:
Company Drive-In sales	$ 96,782	$ 97,274
Franchise Drive-Ins:
Franchise royalties	28,791	29,012
Franchise fees	285	369
Lease revenue	1,288	1,367
Other	1,133	1,124
Total revenues	128,279	129,146
Costs and expenses:
Food and packaging	27,725	26,999
Payroll and other employee benefits	35,084	35,557
Other operating expenses, exclusive of depreciation and amortization included below	22,911	22,406
Total costs and expenses	85,720	84,962
Selling, general and administrative	15,417	16,281
Depreciation and amortization	10,466	10,300
Provision for impairment of long-lived assets		88
Total operating expenses	111,603	111,631
Other operating income, net	78	277
Income from operations	16,754	17,792
Interest expense	8,041	8,282
Interest income	(164)	(203)
Net interest expense	7,877	8,079
Income before income taxes	8,877	9,713
Provision for income taxes	3,378	2,471
Net income	$ 5,499	$ 7,242
Basic income per share	$ 0.09	$ 0.12
Diluted income per share	$ 0.09	$ 0.12