Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Aug. 31, 2015	Aug. 31, 2014
Deferred tax assets:
Allowance for doubtful accounts and notes receivable	$ 411	$ 677
Leasing transactions	3,260	3,252
Deferred income	2,810	1,773
Accrued liabilities	5,630	3,399
Stock compensation	2,831	4,921
Other	541	688
State net operating losses	14,222	11,305
Total deferred tax assets	29,705	26,015
Valuation allowance	(12,041)	(11,305)
Total deferred tax assets after valuation allowance	17,664	14,710
Deferred tax liabilities:
Prepaid expenses	(1,315)	(1,498)
Investment in partnerships, including differences in capitalization, depreciation and direct financing leases	(3,711)	(2,954)
Property, equipment and capital leases	(31,167)	(24,655)
Intangibles and other assets	(20,341)	(19,514)
Debt extinguishment	(2,515)	(3,353)
Total deferred tax liabilities	(59,049)	(51,974)
Net deferred tax liabilities	(41,385)	(37,264)
Net deferred tax assets and liabilities are classified as follows:
Current	2,164	347
Noncurrent	(43,549)	(37,611)
Net deferred tax liabilities	$ (41,385)	$ (37,264)