Restructuring Costs (Details) $ in Thousands	6 Months Ended
	Apr. 30, 2019 USD ($) employee	Apr. 30, 2018 USD ($) employee
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 3,847	$ 2,939
Additional liability recorded	6,341	10,320
Cash payments	(7,514)	(10,107)
Balance at end of period	2,674	3,152
Current restructuring liabilities	1,449	2,177
Non-current restructuring liabilities	1,225	975
Workforce reduction
Activity and balance of the restructuring liability accounts
Balance at beginning of period	2,108	1,291
Additional liability recorded	5,661	8,232
Cash payments	(6,667)	(8,211)
Balance at end of period	1,102	1,312
Current restructuring liabilities	1,102	1,312
Non-current restructuring liabilities	$ 0	$ 0
Number of employee reduction | employee	95	150
Consolidation of excess facilities
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 1,739	$ 1,648
Additional liability recorded	680	2,088
Cash payments	(847)	(1,896)
Balance at end of period	1,572	1,840
Current restructuring liabilities	347	865
Non-current restructuring liabilities	$ 1,225	$ 975