Consolidated Statements of Comprehensive Income - Unaudited (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Feb. 28, 2013		Feb. 29, 2012		Feb. 28, 2013		Feb. 29, 2012
Net income	$ 44,539		$ 46,746		$ 94,307		$ 92,290
Other comprehensive income (loss), net of tax
Net unrealized gain (loss) on cash flow hedges*	84	[1]	1,010	[1]	1,371	[1]	(1,106)	[1]
Foreign currency translation adjustments	(4,731)		2,835		(1,657)		(8,813)
Other comprehensive (loss) income	(4,647)		3,845		(286)		(9,919)
Comprehensive income	$ 39,892		$ 50,591		$ 94,021		$ 82,371

[1] The unrealized gain (loss) on cash flow hedges disclosed above was net of tax (expense) benefit of $(50) and $(824) for the three and six months ended February 28, 2013, respectively, and $(608) and $665 for the corresponding periods of fiscal 2012, respectively.