Segments - Net Sales of Complementary Products (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 30, 2024	Jan. 31, 2024	Oct. 31, 2023	Jul. 31, 2023	Apr. 30, 2023	Jan. 31, 2023	Oct. 31, 2022	Jul. 31, 2022	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Revenue from External Customer [Line Items]
Total net sales	$ 1,413,029	$ 1,258,348	$ 1,420,930	$ 1,409,600	$ 1,304,102	$ 1,234,618	$ 1,430,979	$ 1,359,553	$ 5,501,907	$ 5,329,252	$ 4,634,875
Complementary products
Revenue from External Customer [Line Items]
Total net sales									1,650,689	1,537,617	1,328,383
Tools and fasteners
Revenue from External Customer [Line Items]
Total net sales									346,482	319,466	239,069
Insulation
Revenue from External Customer [Line Items]
Total net sales									320,209	293,755	254,374
Joint treatment
Revenue from External Customer [Line Items]
Total net sales									265,086	240,988	200,080
Lumber
Revenue from External Customer [Line Items]
Total net sales									151,457	147,507	176,994
EIFS/stucco
Revenue from External Customer [Line Items]
Total net sales									178,948	145,517	113,886
Other
Revenue from External Customer [Line Items]
Total net sales									$ 388,507	$ 390,384	$ 343,980