Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Nov. 30, 2012	Nov. 30, 2011
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 5,606	$ 5,868
Common stock, par value (usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized	1,200,000,000	1,200,000,000
Common stock, shares issued	163,698,000	166,287,000
Common stock, shares outstanding	163,698,000	166,287,000