Restructuring Costs (Details) $ in Thousands	12 Months Ended
	Oct. 31, 2019 USD ($) employee	Oct. 31, 2018 USD ($) employee	Oct. 31, 2017 USD ($) employee
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 3,847	$ 2,939	$ 2,838
Additional liability recorded	24,538	18,743	11,315
Adjustment to previous estimates			(1,048)
Cash payments	(13,242)	(17,835)	(10,166)
Balance at end of period	15,143	3,847	2,939
Current restructuring liabilities	5,467
Non-current restructuring liabilities	9,676
Workforce reduction
Activity and balance of the restructuring liability accounts
Balance at beginning of period	2,108	1,291	868
Additional liability recorded	13,779	14,853	5,883
Adjustment to previous estimates			0
Cash payments	(11,904)	(14,036)	(5,460)
Balance at end of period	3,983	$ 2,108	$ 1,291
Current restructuring liabilities	3,983
Non-current restructuring liabilities	$ 0
Restructuring and Related Cost, Positions Eliminated [Abstract]
Number of employees in workforce reduction | employee	283	240	100
Consolidation of excess facilities
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 1,739	$ 1,648	$ 1,970
Additional liability recorded	10,759	3,890	5,432
Adjustment to previous estimates			(1,048)
Cash payments	(1,338)	(3,799)	(4,706)
Balance at end of period	11,160	$ 1,739	$ 1,648
Current restructuring liabilities	1,484
Non-current restructuring liabilities	$ 9,676