Restructuring Costs (Details) $ in Thousands	3 Months Ended
	Jan. 31, 2018 USD ($) employee	Jan. 31, 2017 USD ($)
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 2,939	$ 2,838
Additional liability recorded	5,961	2,395
Cash payments	(5,741)	(3,164)
Balance at end of period	3,159	2,069
Current restructuring liabilities	1,835	1,633
Non-current restructuring liabilities	$ 1,324	436
Workforce reduction
Restructuring Cost and Reserve [Line Items]
Number of employee reduction | employee	100
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 1,291	868
Additional liability recorded	4,413	2,008
Cash payments	(4,459)	(2,512)
Balance at end of period	1,245	364
Current restructuring liabilities	1,245	364
Non-current restructuring liabilities	0	0
Consolidation of excess facilities
Activity and balance of the restructuring liability accounts
Balance at beginning of period	1,648	1,970
Additional liability recorded	1,548	387
Cash payments	(1,282)	(652)
Balance at end of period	1,914	1,705
Current restructuring liabilities	590	1,269
Non-current restructuring liabilities	$ 1,324	$ 436