CONDENSED CONSOLIDATED BALANCE SHEETS - UNAUDITED [PARENTHETICAL] - $ / shares shares in Thousands	Jul. 31, 2018	Oct. 31, 2017
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	150,000
Common stock, shares issued	53,350	52,776
Common stock, shares outstanding	53,350	52,776
Class A Common Stock [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	150,000
Common stock, shares issued	79,522	79,227
Common stock, shares outstanding	79,522	79,227
Previously Reported [Member]
Common stock, shares authorized		75,000
Previously Reported [Member] | Class A Common Stock [Member]
Common stock, shares authorized		75,000