Revenue - Sales by Product Category (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	$ 5,681,131	$ 4,173,775
Lumber and Lumber Sheet Goods
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	2,325,355	1,769,299
Manufactured Products
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	1,354,587	860,913
Windows, Doors and Millwork
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	1,011,572	736,156
Specialty Building Products & Services
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	$ 989,617	$ 807,407