Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Apr. 30, 2024	Apr. 30, 2023
Deferred tax assets:
Deferred compensation	$ 136,722	$ 120,361
Operating lease liability	22,693	26,952
Loss carryforwards	28,542	28,707
Reserves and accruals	20,398	21,140
Allowance for doubtful accounts	7,169	7,272
Deferred revenue	7,086	6,436
Gross deferred tax assets	222,610	210,868
Deferred tax liabilities:
Operating lease, right-of-use, assets	(19,316)	(22,056)
Intangibles and goodwill	(24,697)	(26,310)
Property and equipment	(12,567)	(15,953)
Prepaid expenses	(16,172)	(20,037)
Unrealized gain on marketable securities	(6,164)	(402)
Other	(2,158)	(4,179)
Gross deferred tax liabilities	(81,074)	(88,937)
Valuation allowances	(12,512)	(25,226)
Net deferred tax asset	$ 129,024	$ 96,705