CONDENSED CONSOLIDATED BALANCE SHEETS - UNAUDITED [PARENTHETICAL] - $ / shares shares in Thousands	Jul. 31, 2017	Oct. 31, 2016
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	75,000	75,000
Common stock, shares issued	33,770	33,715
Common stock, shares outstanding	33,770	33,715
Class A Common Stock [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	75,000	75,000
Common stock, shares issued	50,639	50,396
Common stock, shares outstanding	50,639	50,396