Warranty (Schedule of Product Warranty Liability) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Nov. 30, 2013	Dec. 01, 2012
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance at beginning of period	$ 8,443	$ 6,990
Provision	2,770	2,486
Claims paid	(2,868)	(1,927)
Balance at end of period	$ 8,345	$ 7,549