Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2015	Aug. 31, 2013	Aug. 31, 2014
Income Tax Contingency [Line Items]
State net operating loss carryforwards, valuation allowance	$ 12,000		$ 11,300
Unrecognized tax benefits	3,652	$ 2,583	2,461
Unrecognized tax benefits, accrued interest and penalty	400		400
Increase in unrecognized tax benefits	1,200
Unrecognized tax benefits, income tax penalties and interest net expense	100
Unrecognized tax benefits, income tax penalties and interest net benefit		$ 400
Possible change in unrecognized tax benefits, lower bound	100
Possible change in unrecognized tax benefits, upper bound	(3,000)
Income taxes receivable, current	$ 1,741		$ 1,887
Minimum [Member]
Income Tax Contingency [Line Items]
Operating Loss Carryforwards, Expiration Dates	Dec. 01, 2015
Maximum [Member]
Income Tax Contingency [Line Items]
Operating Loss Carryforwards, Expiration Dates	May 31, 2036