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Income Taxes - Schedule of Differences between Income Tax Expense at Federal Statutory Rate and Actual Income Taxes (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2017
Income Tax Disclosure [Abstract] |  |  |
Provision at federal statutory rate | $ 38,779 | $ 170,095 | $ 194,735
Differences between U.S. federal statutory and foreign tax rates | 1,478 |  |
U.S. state and local income taxes, net of federal benefit | 4,642 | 14,255 | 11,021
Nondeductible compensation | 2,401 |  |
Nondeductible acquisition costs | 3,031 |  |
Nondeductible foreign currency forward contract loss on acquisition | 14,863 |  |
Nontaxable foreign currency remeasurement gains | (12,942) |  |
Federal income tax credits and incentives | (3,373) | (3,518) | (3,228)
Domestic production activities deduction |  | (16,175) | (19,527)
Change in uncertain tax positions | 1,279 | 396 | 375
Effect of the U.S. Tax Act |  | 38,620 |
Other | 2,043 | (795) | (1,244)
Total income tax expense | $ 52,201 | $ 202,878 | $ 182,132

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
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