Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Aug. 31, 2012	Dec. 02, 2011
Current assets:
Allowances for doubtful accounts	$ 14,516	$ 15,080
Stockholders' equity:
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	2,000	2,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	900,000	900,000
Common stock, shares issued	600,834	600,834
Common stock, shares outstanding	494,732	491,540
Treasury stock, shares	106,102	109,294