Acquisitions - Proforma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Business Combinations [Abstract]
Total revenue	$ 4,113,565	$ 4,046,707	$ 8,043,200	$ 8,580,418
Net income	$ 159,139	$ 138,353	$ 329,705	$ 290,080
Net income per common share
Basic (in dollars per share)	$ 4.27	$ 3.71	$ 8.85	$ 7.79
Diluted (in dollars per share)	$ 4.25	$ 3.69	$ 8.80	$ 7.74