Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 93,723	$ (29,722)	$ 61,193
Other comprehensive income (loss), net of tax:
Change in pension benefits, net of taxes (benefit) of $0, $18,481 and $(1,156), respectively	0	54,568	(3,395)
Change in cash flow hedges (swap), net of taxes of $50, $3,463, and $0, respectively	147	10,225	0
Total Comprehensive Income	$ 93,870	$ 35,071	$ 57,798