Business Segment Information Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017	Oct. 31, 2017
Segment Reporting Information [Line Items]
Revenue, Net	$ 297,340	$ 273,031	$ 545,006	$ 520,969
Long-Lived Assets	372,181		372,181		$ 309,775
UNITED STATES \| Reportable Geographical Components [Member]
Segment Reporting Information [Line Items]
Revenue, Net	213,560	223,563	403,018	426,763
Long-Lived Assets	239,252		239,252		235,663
Europe [Member] \| Reportable Geographical Components [Member]
Segment Reporting Information [Line Items]
Revenue, Net	73,966	42,503	122,345	78,172
Foreign Currency Transaction Gain, before Tax	(187)	(173)	(318)	(32)
Long-Lived Assets	107,387		107,387		53,569
Rest of World [Member] \| Reportable Geographical Components [Member]
Segment Reporting Information [Line Items]
Revenue, Net	9,814	6,965	19,643	16,034
Foreign Currency Transaction Gain, before Tax	29	$ (131)	44	$ (404)
Long-Lived Assets	$ 25,542		$ 25,542		$ 20,543
Sales [Member] \| Non-US [Member]
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	28.20%	18.10%	26.10%	18.10%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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