Segments - Net Sales of Complementary Products (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 30, 2023	Jan. 31, 2023	Oct. 31, 2022	Jul. 31, 2022	Apr. 30, 2022	Jan. 31, 2022	Oct. 31, 2021	Jul. 31, 2021	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Revenue from External Customer [Line Items]
Total net sales	$ 1,304,102	$ 1,234,618	$ 1,430,979	$ 1,359,553	$ 1,288,653	$ 1,153,595	$ 1,150,551	$ 1,042,076	$ 5,329,252	$ 4,634,875	$ 3,298,823
Complementary products
Revenue from External Customer [Line Items]
Total net sales									1,537,617	1,328,383	1,031,361
Tools and fasteners
Revenue from External Customer [Line Items]
Total net sales									319,466	239,069	167,914
Insulation
Revenue from External Customer [Line Items]
Total net sales									293,755	254,374	221,598
Joint treatment
Revenue from External Customer [Line Items]
Total net sales									240,988	200,080	162,925
Lumber
Revenue from External Customer [Line Items]
Total net sales									147,507	176,994	138,333
EIFS/stucco
Revenue from External Customer [Line Items]
Total net sales									145,517	113,886	78,941
Other
Revenue from External Customer [Line Items]
Total net sales									$ 390,384	$ 343,980	$ 261,650