Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2022	Jul. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 20,070	$ 2,981
Other comprehensive income, net of tax:
Change in pension benefits, net of deferred taxes of $— and $126 for the three months ended July 31, 2022 and 2021, respectively	0	373
Change in cash flow hedges (swap), net of deferred taxes of $(433) and $(194) for the three months ended July 31, 2022 and 2021, respectively	(1,278)	(573)
Total Comprehensive Income	$ 18,792	$ 2,781