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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)

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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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