CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Aug. 31, 2012	Nov. 30, 2011
Accounts receivable, allowances	$ 5,488	$ 5,868
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	1,200,000	1,200,000
Common stock, shares issued	162,442	166,287
Common stock, shares outstanding	162,442	166,287