Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Aug. 31, 2016	Aug. 31, 2015
Deferred tax assets:
Allowance for doubtful accounts and notes receivable	$ 387	$ 411
Leasing transactions	3,222	3,260
Deferred income	2,991	2,810
Accrued liabilities	6,187	5,630
Stock compensation	2,446	2,831
Other	685	541
State net operating losses	16,303	14,222
Total deferred tax assets	32,221	29,705
Valuation allowance	(14,638)	(12,041)
Total deferred tax assets after valuation allowance	17,583	17,664
Deferred tax liabilities:
Prepaid expenses	(1,119)	(1,315)
Investment in partnerships, including differences in capitalization, depreciation and direct financing leases	(4,125)	(3,711)
Property, equipment and capital leases	(31,565)	(31,167)
Intangibles and other assets	(21,628)	(20,341)
Debt extinguishment	(1,676)	(2,515)
Total deferred tax liabilities	(60,113)	(59,049)
Net deferred tax liabilities	(42,530)	(41,385)
Net deferred tax assets and liabilities are classified as follows:
Current		2,164
Noncurrent	(42,530)	(43,549)
Net deferred tax liabilities	$ (42,530)	$ (41,385)