Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Condensed Statement of Income Captions [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	$ 21,944	$ (1,156)	$ (573)
Other Comprehensive Income (Loss), Tax	8,687	18,344	24,702
Pension Plan, Defined Benefit [Member]
Condensed Statement of Income Captions [Line Items]
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	18,481	$ (1,156)	$ (573)
Cash Flow Hedging
Condensed Statement of Income Captions [Line Items]
Other Comprehensive Income (Loss), Tax	$ 3,463