Net Income Per Common Share - Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Basic
Net income	$ 501,972	$ 446,691	$ 339,790
Weighted average shares outstanding-basic (shares)	37,164,022	37,266,851	37,158,898
Basic earnings per common share (in Dollars per share)	$ 13.51	$ 11.99	$ 9.14
Diluted
Net income	$ 501,972	$ 446,691	$ 339,790
Weighted average shares outstanding-basic (shares)	37,164,022	37,266,851	37,158,898
Plus effect of stock options and restricted stock units (shares)	206,284	252,844	197,800
Weighted-average shares outstanding-diluted (shares)	37,370,306	37,519,695	37,356,698
Diluted earnings per common share (in Dollars per share)	$ 13.43	$ 11.91	$ 9.10