Income Taxes - Schedule of Income Tax Provision (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2010
Current
Federal	$ 9,565	$ 10,564	$ 3,409
State	7,851	8,922	4,081
Foreign	4,812	53	1,441
Current Total	22,228	19,539	8,931
Deferred
Federal	66,707	54,435	43,361
State	1,617	9,454	1,823
Foreign	(9,700)	3,200	(5,677)
Deferred Total	58,624	67,089	39,507
Total	$ 80,852	$ 86,628	$ 48,438