Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Apr. 30, 2012	Oct. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowances	$ 3,116	$ 2,489
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	2,000,000	2,000,000
Preferred Stock, shares outstanding	0	0
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	400,000,000	400,000,000
Common Stock, shares outstanding	146,950,000	143,308,000
Treasury Stock, shares	10,315,000	13,956,000