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Taxes - Provision for Income Taxes and Effective Tax Rates (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Income Tax Disclosure [Abstract]
Income before income taxes	$ 133,917	$ 119,299	$ 280,972	$ 239,402
Provision (benefit) for income taxes	$ 15,707	$ 16,827	$ 9,248	$ 140,621
Effective tax rate	11.70%	14.10%	3.30%	58.70%

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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