Restructuring Costs (Details) $ in Thousands	6 Months Ended
	Apr. 30, 2018 USD ($) employee	Apr. 30, 2017 USD ($) employee
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 2,939	$ 2,838
Additional liability recorded	10,320	6,671
Cash payments	(10,107)	(4,217)
Balance at end of period	3,152	5,292
Current restructuring liabilities	2,177	5,081
Non-current restructuring liabilities	$ 975	$ 211
Workforce reduction
Restructuring Cost and Reserve [Line Items]
Number of employee reduction | employee	150	50
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 1,291	$ 868
Additional liability recorded	8,232	2,369
Cash payments	(8,211)	(3,084)
Balance at end of period	1,312	153
Current restructuring liabilities	1,312	153
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	2,088	4,302
Cash payments	(1,896)	(1,133)
Balance at end of period	1,840	5,139
Current restructuring liabilities	865	4,928
Non-current restructuring liabilities	$ 975	$ 211