Segments - Net Sales of Complementary Products (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2024	Jul. 31, 2023
Revenue from external customers
Net sales	$ 1,448,456	$ 1,409,600
Complementary products
Revenue from external customers
Net sales	443,513	426,210
Tools and fasteners
Revenue from external customers
Net sales	91,169	83,675
Insulation
Revenue from external customers
Net sales	85,043	78,387
Joint treatment
Revenue from external customers
Net sales	75,289	65,282
Lumber
Revenue from external customers
Net sales	43,023	42,074
EIFS/stucco
Revenue from external customers
Net sales	50,952	46,296
Other
Revenue from external customers
Net sales	$ 98,037	$ 110,496