Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2014
Income Tax Contingency [Line Items]
State net operating loss carryforwards, valuation allowance	$ 14,600	$ 12,000
Unrecognized tax benefits	625	3,652	$ 2,461
Unrecognized tax benefits, accrued interest and penalty	300	400
Decrease in unrecognized tax benefits	(3,000)
Unrecognized tax benefits, income tax penalties and interest net benefit	100
Unrecognized tax benefits, income tax penalties and interest net expense		$ 100
Possible change in unrecognized tax benefits, upper bound	$ (600)
Minimum [Member]
Income Tax Contingency [Line Items]
Operating Loss Carryforwards, Expiration Dates	Dec. 01, 2016
Maximum [Member]
Income Tax Contingency [Line Items]
Operating Loss Carryforwards, Expiration Dates	May 31, 2037