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Quarterly Financial Data (Unaudited) - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jan. 31, 2019	Oct. 31, 2019	Oct. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Discrete tax expense	$ 4,866	$ 4,866	$ (49,082)

X

- References

No definition available.

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- Definition

Amount of income tax expense (benefit) for remeasurement of deferred tax from change in tax rate pursuant to Tax Cuts and Jobs Act.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319

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