Goodwill and Intangible Assets - Narrative (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 30, 2020 USD ($)	Apr. 30, 2022 USD ($) unit	Apr. 30, 2021 USD ($)	Apr. 30, 2020 USD ($)
Finite-Lived Intangible Assets [Line Items]
Goodwill		$ 695,897	$ 576,330
Number of reporting units | unit		9
Impairment of goodwill	$ (63,100)	$ 0	0	$ (63,074)
Tradenames		84,400	61,400
Amortization expense		63,795	57,645	65,201
Other
Finite-Lived Intangible Assets [Line Items]
Goodwill		107,900
Canada
Finite-Lived Intangible Assets [Line Items]
Goodwill		138,300
Impairment of goodwill	$ (63,100)
Depreciation and amortization expense
Finite-Lived Intangible Assets [Line Items]
Amortization expense		$ 63,800	$ 57,600	$ 65,200