Income Taxes (Components Of Provision For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2013
Income Taxes [Abstract]
Federal, Current	$ 14,597	$ 16,580	$ 16,741
State, Current	3,576	3,490	2,688
Current	18,173	20,070	19,429
Federal, Deferred	10,592	5,328	439
State, Deferred	(1,528)	450	(270)
Deferred	9,064	5,778	169
Provision for income taxes	$ 27,237	$ 25,848	$ 19,598