Consolidated Statements Of Income - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2014
Revenues:
Company Drive-In sales	$ 425,795	$ 436,031	$ 405,363
Franchise Drive-Ins:
Franchise royalties and fees	170,319	161,342	138,416
Lease revenue	7,459	5,583	4,291
Other	2,747	3,133	4,279
Total revenues	606,320	606,089	552,349
Costs and expenses:
Food and packaging	118,136	121,701	116,325
Payroll and other employee benefits	150,260	151,801	139,939
Other operating expenses, exclusive of depreciation and amortization included below	88,424	90,436	85,845
Total cost of Company Drive-In sales	356,820	363,938	342,109
Selling, general and administrative	82,089	79,336	69,415
Depreciation and amortization	44,418	45,892	42,210
Provision for impairment of long-lived assets	232	1,440	114
Other operating income, net	(4,691)	(945)	(176)
Total costs and expenses	478,868	489,661	453,672
Income from operations	127,452	116,428	98,677
Interest expense	26,714	25,114	25,382
Interest income	(516)	(408)	(469)
Loss from early extinguishment of debt	8,750
Net interest expense	34,948	24,706	24,913
Income before income taxes	92,504	91,722	73,764
Provision for income taxes	28,437	27,237	25,848
Net income	$ 64,067	$ 64,485	$ 47,916
Basic income per share	$ 1.32	$ 1.23	$ 0.87
Diluted income per share	1.29	1.20	0.85
Cash dividends declared per common share	$ 0.44	$ 0.27	$ 0.09