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Foreign Currency Forward Contract - Additional Information (Detail) $ in Thousands, € in Millions		3 Months Ended
	Sep. 18, 2018 EUR (€)	Oct. 31, 2018 USD ($)	Oct. 31, 2018 EUR (€)
Intercompany Foreign Currency Balance [Line Items]
Foreign currency forward contract liability		$ 42,555
Erwin Hymer Group
Intercompany Foreign Currency Balance [Line Items]
Payments to acquire business | €	€ 1,700
Foreign currency forward contract liability		42,555	€ 1,625
Foreign currency gain (loss)		42,555
Erwin Hymer Group | Level 2
Intercompany Foreign Currency Balance [Line Items]
Foreign currency forward contract liability		42,555
Erwin Hymer Group | Level 3
Intercompany Foreign Currency Balance [Line Items]
Foreign currency forward contract liability		$ 42,555

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Foreign Currency Forward Contract Liabilities

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Amount before tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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