Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Aug. 31, 2018	Aug. 31, 2017
Deferred tax assets:
Allowance for doubtful accounts and notes receivable	$ 661	$ 419
Leasing transactions	1,928	3,083
Deferred income	1,846	3,011
Accrued liabilities	2,292	4,339
Stock compensation	1,553	3,156
Other	59	929
State net operating losses	18,659	18,031
Total deferred tax assets	26,998	32,968
Valuation allowance	(17,117)	(16,254)
Total deferred tax assets after valuation allowance	9,881	16,714
Deferred tax liabilities:
Prepaid expenses	(798)	(956)
Investment in partnerships, including differences in capitalization, depreciation and direct financing leases	(3,083)	(4,026)
Property, equipment and capital leases	(12,603)	(23,756)
Intangibles and other assets	(14,837)	(22,983)
Debt extinguishment	0	(838)
Direct financing leases	(2,786)	(4,256)
Total deferred tax liabilities	(34,107)	(56,815)
Net deferred tax liabilities (noncurrent)	$ (24,226)	$ (40,101)