Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
Revenue (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 258,959	$ 263,445	$ 273,370	$ 258,933	$ 300,055	$ 294,883	$ 297,340	$ 247,666	$ 1,054,707	$ 1,139,944	$ 1,041,986
Reportable Geographical Components [Member] \| North America [Member]
Disaggregation of Revenue [Line Items]
Revenues									812,492	887,481	884,650
Reportable Geographical Components [Member] \| Europe and Asia [Member]
Disaggregation of Revenue [Line Items]
Revenues									276,115	281,692	178,895
Geography Eliminations [Member] \| Rest of World [Member]
Disaggregation of Revenue [Line Items]
Revenues									$ (33,900)	$ (29,229)	$ (21,559)