Restructuring Costs (Details) $ in Thousands	12 Months Ended
	Oct. 31, 2018 USD ($) employee	Oct. 31, 2017 USD ($) employee	Oct. 31, 2016 USD ($) employee
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 2,939	$ 2,838	$ 1,279
Additional liability recorded	18,743	11,315	4,933
Adjustment to previous estimates		(1,048)
Cash payments	(17,835)	(10,166)	(3,374)
Balance at end of period	3,847	2,939	2,838
Current restructuring liabilities	2,610
Non-current restructuring liabilities	1,237
Workforce reduction
Activity and balance of the restructuring liability accounts
Balance at beginning of period	1,291	868	591
Additional liability recorded	14,853	5,883	2,844
Adjustment to previous estimates		0
Cash payments	(14,036)	(5,460)	(2,567)
Balance at end of period	2,108	$ 1,291	$ 868
Current restructuring liabilities	2,108
Non-current restructuring liabilities	$ 0
Restructuring and Related Cost, Positions Eliminated [Abstract]
Number of employees in workforce reduction | employee	240	100	75
Consolidation of excess facilities
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 1,648	$ 1,970	$ 688
Additional liability recorded	3,890	5,432	2,089
Adjustment to previous estimates		(1,048)
Cash payments	(3,799)	(4,706)	(807)
Balance at end of period	1,739	$ 1,648	$ 1,970
Current restructuring liabilities	502
Non-current restructuring liabilities	$ 1,237