Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Retained Earnings
Beginning Balance (shares) at Apr. 30, 2022		37,111,667
Beginning Balance at Apr. 30, 2022	$ 2,240,838	$ 79,412	$ 2,161,426
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	446,691		446,691
Dividends declared	(57,488)		(57,488)
Stock-based compensation (shares)		151,581
Share-based compensation (net of tax withholding on employee share-based awards)	30,625	$ 30,625
Ending Balance (shares) at Apr. 30, 2023		37,263,248
Ending Balance at Apr. 30, 2023	2,660,666	$ 110,037	2,550,629
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	501,972		501,972
Dividends declared	(64,673)		(64,673)
Repurchase of common stock (shares)		(392,290)
Repurchase of common stock	(105,451)	$ (105,451)
Stock-based compensation (shares)		137,530
Share-based compensation (net of tax withholding on employee share-based awards)	$ 22,867	$ 22,867
Ending Balance (shares) at Apr. 30, 2024	37,008,488	37,008,488
Ending Balance at Apr. 30, 2024	$ 3,015,381	$ 27,453	2,987,928
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	546,520
Dividends declared	(75,383)		(75,383)
Stock-based compensation (shares)		110,595
Share-based compensation (net of tax withholding on employee share-based awards)	22,152	$ 22,152
Ending Balance (shares) at Apr. 30, 2025		37,119,083
Ending Balance at Apr. 30, 2025	$ 3,508,670	$ 49,605	$ 3,459,065