Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Mar. 01, 2014	Aug. 31, 2013
Accounts receivable, allowance for doubtful accounts	$ 9,071	$ 7,523
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	6,816,366	5,340,587
Class A Common Stock [Member]
Common stock, voting rights	1	1
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	55,424,216	54,634,259
Class B Common Stock [Member]
Common stock, voting rights	10	10
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	13,715,747	14,140,747
Common stock, shares outstanding	13,715,747	14,140,747