Share-Based Compensation Expense - Summary of Stock Option Activity (Details) - $ / shares	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Shares Underlying Options Outstanding
Beginning Balance (in shares)	875,000
Granted (in shares)	0	0	0
Exercised (in shares)	(179,000)
Canceled (in shares)	(420,000)
Ending Balance (in shares)	276,000	875,000
Weighted Average Exercise Price
Beginning Balance (in dollars per share)	$ 30.19
Granted (in dollars per share)	0.00
Exercised (in dollars per share)	12.75
Canceled (in dollars per share)	35.46
Ending Balance (in dollars per share)	$ 33.52	$ 30.19