CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (200,319)	$ 17,233	$ 148,309
Other comprehensive (loss) income:
Foreign currency translation adjustment	(7,481)	3,220	(71,625)
Unamortized retirement costs, net of tax (expense) benefit of $(2,010), $5,967, and $(13,440), respectively	5,884	(24,580)	45,920
Unrealized gain on interest rate swaps, net of tax (expense) of $(663), $(393), and $(2,787), respectively	2,060	604	8,349
Total other comprehensive income (loss)	463	(20,756)	(17,356)
Comprehensive (loss) income	$ (199,856)	$ (3,523)	$ 130,953