CONSOLIDATED BALANCE SHEETS [PARENTHETICAL] - $ / shares shares in Thousands	Oct. 31, 2017	Oct. 31, 2016
Common stock, par value (in dollar per share)	$ 0.01	$ 0.01
Common stock, shares authorized	75,000	75,000
Common stock, shares issued	33,777	33,715
Common stock, shares outstanding	33,777	33,715
Common Class A [Member]
Common stock, par value (in dollar per share)	$ 0.01	$ 0.01
Common stock, shares authorized	75,000	75,000
Common stock, shares issued	50,705	50,396
Common stock, shares outstanding	50,705	50,396