Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Intangible Assets
Gross Intangible	$ 751,472	$ 751,766
Accumulated Amortization	(638,691)	(603,541)
Net Intangible	112,781	148,225
Amortization of intangible assets	35,136	25,806	$ 45,713
Expected future amortization of finite-lived intangible assets
2020	34,008
2021	30,830
2022	24,809
2023	10,000
2024	6,948
Thereafter	6,186
Net Intangible	112,781	148,225
Developed technology
Intangible Assets
Gross Intangible	373,526	373,581
Accumulated Amortization	(308,261)	(285,233)
Net Intangible	65,265	88,348
Expected future amortization of finite-lived intangible assets
Net Intangible	65,265	88,348
Patents and licenses
Intangible Assets
Gross Intangible	3,565	3,565
Accumulated Amortization	(2,244)	(1,958)
Net Intangible	1,321	1,607
Expected future amortization of finite-lived intangible assets
Net Intangible	1,321	1,607
Customer relationships, covenants not to compete, outstanding purchase orders and contracts
Intangible Assets
Gross Intangible	374,381	374,620
Accumulated Amortization	(328,186)	(316,350)
Net Intangible	46,195	58,270
Expected future amortization of finite-lived intangible assets
Net Intangible	$ 46,195	$ 58,270