Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	May 28, 2016	Aug. 29, 2015
Accounts receivable, allowance for doubtful accounts	$ 12,410	$ 11,312
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, at cost, shares	8,325,473	8,037,696
Class A Common Stock [Member]
Common stock, votes per share	1
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	56,701,173	56,400,070
Class B Common Stock [Member]
Common stock, votes per share	10
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	13,085,282	13,295,747
Common stock, shares outstanding	13,085,282	13,295,747