Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2022	Jul. 31, 2021
Change In Pension Benefits And Derivative Hedging Activities [Line Items]
Other comprehensive income, deferred tax	$ 0	$ 126
Cash Flow Hedging
Change In Pension Benefits And Derivative Hedging Activities [Line Items]
Other comprehensive income, deferred tax	$ (433)	$ (194)