CONDENSED CONSOLIDATED BALANCE SHEETS - UNAUDITED [PARENTHETICAL] - $ / shares shares in Thousands	Jan. 31, 2018	Oct. 31, 2017
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	75,000	75,000
Common stock, shares issued	42,228	42,221
Common stock, shares outstanding	42,228	42,221
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	63,455	63,381
Common stock, shares outstanding	63,455	63,381