Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Apr. 30, 2017	Oct. 31, 2016
Statement of Financial Position [Abstract]
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	150,549,000	151,454,000
Treasury stock, shares	6,713,000	5,811,000