Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013	Aug. 25, 2012
Income Tax Disclosure [Abstract]
Beginning balance	$ 27,715	$ 29,906
Additions based on tax positions related to the current year	7,015	6,869
Additions for tax positions of prior years	2,758	44
Reductions for tax positions of prior years	(470)	(1,687)
Reductions due to settlements	(3,019)	(4,586)
Reductions due to statute of limitations	(3,356)	(2,831)
Ending balance	$ 30,643	$ 27,715