Share-Based Compensation Expense - Summary of Stock Option Activity (Details) - $ / shares	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Shares Underlying Options Outstanding
Beginning Balance (in shares)	1,387,000
Granted (in shares)	0	0	0
Exercised (in shares)	(224,000)
Canceled (in shares)	(288,000)
Ending Balance (in shares)	875,000	1,387,000
Weighted Average Exercise Price
Beginning Balance (in dollars per share)	$ 26.90
Granted (in dollars per share)	0.00
Exercised (in dollars per share)	10.76
Canceled (in dollars per share)	29.44
Ending Balance (in dollars per share)	$ 30.19	$ 26.90