Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Current tax expense:
Federal	$ 95,336	$ 4,382	$ 73,950
State	22,365	13,835	16,397
Current income tax expense (benefit)	117,701	18,217	90,347
Deferred tax expense	23,126	82,721	4,123
Total income tax expense	$ 140,827	$ 100,938	$ 94,470