Income Taxes - Schedule of Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Apr. 30, 2025	Apr. 30, 2024
Deferred tax assets:
Deferred compensation	$ 145,410	$ 136,722
Operating lease liability	18,015	22,693
Loss carryforwards	25,565	28,542
Reserves and accruals	20,833	20,398
Allowance for doubtful accounts	6,786	7,169
Deferred revenue	6,112	7,086
Gross deferred tax assets	222,721	222,610
Deferred tax liabilities:
Operating lease, right-of-use, assets	(14,531)	(19,316)
Intangibles and goodwill	(24,753)	(24,697)
Property and equipment	(10,306)	(12,567)
Prepaid expenses	(15,997)	(16,172)
Unrealized gain on marketable securities	(6,502)	(6,164)
Other	(2,584)	(2,158)
Gross deferred tax liabilities	(74,673)	(81,074)
Valuation allowances	(9,469)	(12,512)
Net deferred tax asset	$ 138,579	$ 129,024