Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Mar. 04, 2017	Sep. 03, 2016
Accounts receivable, allowance for doubtful accounts	$ 12,684	$ 12,353
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	8,358,937	8,344,514
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	53,445,476	52,992,682
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	11,850,636	11,933,233
Common stock, shares outstanding	11,850,636	11,933,233