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Schedule of Components of Provision (Benefit) for Income Taxes from Continuing Operations (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Jul. 31, 2018 | Jul. 31, 2017 | Jul. 31, 2016
Income Tax Disclosure [Abstract] |  |  |
Federal | $ 166,402 | $ 200,370 | $ 126,846
State and local | 21,025 | 20,941 | 12,716
Total current expense | 187,427 | 221,311 | 139,562
Federal | 17,820 | (37,033) | (13,079)
State and local | (2,369) | (2,146) | (1,192)
Total deferred expense (benefit) | 15,451 | (39,179) | (14,271)
Total income tax expense | $ 202,878 | $ 182,132 | $ 125,291

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