Condensed Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016
Revenues:
Company Drive-In sales	$ 72,062	$ 115,143	$ 223,500	$ 314,339
Franchise Drive-Ins:
Franchise royalties and fees	48,220	46,687	122,687	122,656
Lease revenue	2,418	2,141	5,474	5,132
Other	1,290	1,268	2,038	2,075
Total revenues	123,990	165,239	353,699	444,202
Costs and expenses:
Food and packaging	19,380	32,089	61,112	87,248
Payroll and other employee benefits	25,590	39,912	82,688	111,635
Other operating expenses, exclusive of depreciation and amortization included below	13,836	22,442	47,540	65,450
Total cost of Company Drive-In sales	58,806	94,443	191,340	264,333
Selling, general and administrative	20,763	20,617	58,813	62,342
Depreciation and amortization	9,520	11,405	29,531	33,461
Other operating income, net	(540)	(106)	(11,105)	(3,071)
Total costs and expenses	88,549	126,359	268,579	357,065
Income from operations	35,441	38,880	85,120	87,137
Interest expense	7,318	6,776	21,734	19,465
Interest income	(291)	(121)	(1,047)	(326)
Debt extinguishment costs	0	8,750	0	8,750
Net interest expense	7,027	15,405	20,687	27,889
Income before income taxes	28,414	23,475	64,433	59,248
Provision for income taxes	9,663	8,122	21,601	20,618
Net income	$ 18,751	$ 15,353	$ 42,832	$ 38,630
Basic income per share (usd per share)	$ 0.44	$ 0.32	$ 0.97	$ 0.79
Diluted income per share (usd per share)	0.44	0.31	0.96	0.77
Cash dividends declared per common share (usd per share)	$ 0.14	$ 0.11	$ 0.42	$ 0.33