Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Aug. 29, 2015	Aug. 30, 2014
Accounts receivable, allowance for doubtful accounts	$ 11,312	$ 9,310
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Class A treasury stock, shares	8,037,696	7,657,386
Class A Common Stock [Member]
Common stock, voting rights	1
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	56,400,070	55,980,199
Class B Common Stock [Member]
Common stock, voting rights	10
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	13,295,747	13,295,747
Common stock, shares outstanding	13,295,747	13,295,747