Goodwill And Other Intangibles (Narrative) (Details) (USD $)	12 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2012
Goodwill And Other Intangibles [Abstract]
Goodwill	$ 77,093,000	$ 77,093,000	$ 76,997,000
Gross carrying amount of franchise agreements, intellectual property franchise fees and other intangibles	10,300,000	10,300,000
Accumulated amortization of intangible assets	5,000,000	4,100,000
Amortization of intangible assets	900,000	900,000	800,000
Weighted-average life of amortizable intangible assets	11 years
Estimated intangible assets amortization expense, 2015	900,000
Estimated intangible assets amortization expense, 2016	900,000
Estimated intangible assets amortization expense, 2017	900,000
Estimated intangible assets amortization expense, 2018	300,000
Estimated intangible assets amortization expense, 2019	$ 300,000