Goodwill and Other Intangible Assets - Changes in Net Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Oct. 31, 2019	Oct. 31, 2018
Changes in the net carrying amount of goodwill
Goodwill as of the beginning of the fiscal period	$ 225,290	$ 205,029
Goodwill acquired	137,058	20,739
Translation adjustments	(95)	(478)
Goodwill as of the end of the fiscal period	362,253	225,290
Other
Changes in the net carrying amount of goodwill
Goodwill as of the beginning of the fiscal period	0	0
Goodwill acquired	1,534	0
Translation adjustments	0	0
Goodwill as of the end of the fiscal period	1,534	0
Operating Segments \| Professional
Changes in the net carrying amount of goodwill
Goodwill as of the beginning of the fiscal period		194,464
Goodwill acquired	135,524	20,739
Translation adjustments	(101)	(376)
Operating Segments \| Residential
Changes in the net carrying amount of goodwill
Goodwill as of the beginning of the fiscal period	10,463	10,565
Goodwill acquired	0	0
Translation adjustments	6	(102)
Goodwill as of the end of the fiscal period	$ 10,469	$ 10,463

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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-Publisher FASB
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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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