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Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Apr. 30, 2019 | Apr. 30, 2018
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Income Tax Disclosure [Abstract] |  |
Deferred compensation | $ 75,521 | $ 67,852
Loss carryforwards | 22,467 | 22,297
Reserves and accruals | 12,954 | 13,945
Deferred rent | 7,652 | 6,827
Deferred revenue | 1,090 | 1,793
Allowance for doubtful accounts | 3,217 | 2,296
Other |  | 982
Gross deferred tax assets | 122,901 | 115,992
Intangibles | (28,958) | (57,046)
Property and equipment | (15,883) | (5,000)
Prepaid expenses | (20,152) | (19,123)
Other | (1,759) | (2,726)
Gross deferred tax liabilities | (66,752) | (83,895)
Valuation allowances | (14,032) | (15,682)
Net deferred tax asset | $ 42,117 | $ 16,415

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