Provision for Income Taxes (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Feb. 01, 2019	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Income Tax Contingency [Line Items]
Effective income tax rate		22.50%	389.10%	23.80%	74.40%
Expected decrease in unrecognized tax benefits due to resolution of uncertain tax positions		$ 4,500		$ 4,500
Accrued interest		900		900
Foreign currency transaction gain (loss)		$ 3,802		$ 2,843
Not Designated as Hedging Instrument
Income Tax Contingency [Line Items]
Foreign currency transaction gain (loss)	$ (70,777)
Erwin Hymer Group | Not Designated as Hedging Instrument
Income Tax Contingency [Line Items]
Foreign currency transaction gain (loss)			$ (31,152)		$ (73,707)