Segments - Net Sales of Complementary Products (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2025	Jul. 31, 2024
Revenue from external customers
Total net sales	$ 1,414,332	$ 1,448,456
Complementary products
Revenue from external customers
Total net sales	440,457	443,513
Tools and fasteners
Revenue from external customers
Total net sales	86,782	91,169
Insulation
Revenue from external customers
Total net sales	84,121	85,043
Joint treatment
Revenue from external customers
Total net sales	74,979	75,289
Lumber
Revenue from external customers
Total net sales	45,090	43,023
EIFS/stucco
Revenue from external customers
Total net sales	53,957	50,952
Other
Revenue from external customers
Total net sales	$ 95,528	$ 98,037