Restructuring Costs (Details) $ in Thousands	9 Months Ended
	Jul. 31, 2018 USD ($) employee	Jul. 31, 2017 USD ($) employee
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 2,939	$ 2,838
Additional liability recorded	16,679	8,874
Cash payments	(14,071)	(6,049)
Balance at end of period	5,547	5,663
Current restructuring liabilities	4,256	5,663
Non-current restructuring liabilities	1,291	0
Workforce reduction
Activity and balance of the restructuring liability accounts
Balance at beginning of period	1,291	868
Additional liability recorded	12,876	3,967
Cash payments	(10,987)	(3,370)
Balance at end of period	3,180	1,465
Current restructuring liabilities	3,180	1,465
Non-current restructuring liabilities	$ 0	$ 0
Number of employee reduction | employee	230	60
Consolidation of excess facilities
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 1,648	$ 1,970
Additional liability recorded	3,803	4,907
Cash payments	(3,084)	(2,679)
Balance at end of period	2,367	4,198
Current restructuring liabilities	1,076	4,198
Non-current restructuring liabilities	$ 1,291	$ 0