Employee Stock Plans - Schedule of Restricted Stock Activity (Detail) - Restricted stock - $ / shares shares in Thousands	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Shares
Beginning balance (in shares)	1,974	2,063	1,980
Granted (in shares)	719	854	1,143
Vested (in shares)	(884)	(682)	(1,006)
Forfeited (in shares)	(39)	(261)	(54)
Ending balance (in shares)	1,770	1,974	2,063
Weighted- Average Grant Date Fair Value
Weighted-average, beginning balance (in dollars per share)	$ 53.83	$ 50.12	$ 40.32
Weighted-average, granted (in dollars per share)	73.35	51.32	49.12
Weighted-average, vested (in dollars per share)	50.54	40.09	37.72
Weighted-average, forfeited (in dollars per share)	42.03	52.22	52.58
Weighted-average, ending balance (in dollars per share)	$ 63.15	$ 53.83	$ 50.12