Segments - Net Sales by Major Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 30, 2022	Jan. 31, 2022	Oct. 31, 2021	Jul. 31, 2021	Apr. 30, 2021	Jan. 31, 2021	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales	$ 1,288,653	$ 1,153,595	$ 1,150,551	$ 1,042,076	$ 932,203	$ 751,191	$ 812,856	$ 802,573	$ 4,634,875	$ 3,298,823	$ 3,241,307
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales									3,993,717	2,770,450	2,805,920
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales									$ 641,158	$ 528,373	$ 435,387