Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2014	May 31, 2013
Revenues:
Company Drive-In sales	$ 111,014	$ 108,445	$ 286,361	$ 285,607
Franchise Drive-Ins:
Franchise royalties and fees	38,795	35,833	96,598	91,749
Lease revenue	1,081	1,089	2,682	3,524
Other	1,297	1,267	2,939	2,903
Total revenues	152,187	146,634	388,580	383,783
Costs and expenses:
Food and packaging	32,175	30,776	81,454	80,954
Payroll and other employee benefits	37,737	37,924	101,108	102,837
Other operating expenses, exclusive of depreciation and amortization included below	21,805	21,356	62,049	62,143
Total cost of Company Drive-In sales	91,717	90,056	244,611	245,934
Selling, general and administrative	17,639	16,943	50,530	48,540
Depreciation and amortization	11,022	9,783	31,087	30,447
Other operating (income) expense, net	128	(142)	(37)	(353)
Total costs and expenses	120,506	116,640	326,191	324,568
Income from operations	31,681	29,994	62,389	59,215
Interest expense	6,328	7,170	19,095	22,293
Interest income	(112)	(153)	(373)	(462)
Loss from early extinguishment of debt				492
Net interest expense	6,216	7,017	18,722	22,323
Income before income taxes	25,465	22,977	43,667	36,892
Provision for income taxes	8,689	8,184	14,576	12,389
Net income	$ 16,776	$ 14,793	$ 29,091	$ 24,503
Basic income per share	$ 0.31	$ 0.26	$ 0.52	$ 0.43
Diluted income per share	$ 0.30	$ 0.26	$ 0.51	$ 0.43