Revenue - Sales by Product Category (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	$ 6,926,259	$ 5,576,682	$ 12,607,391	$ 9,750,457
Lumber and Lumber Sheet Goods
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	2,831,867	2,596,520	5,168,367	4,365,818
Manufactured Products
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	1,702,880	1,088,828	3,063,240	1,949,742
Windows, Doors and Millwork
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	1,218,261	846,610	2,244,117	1,591,291
Specialty Building Products & Services
Entity Wide Information Revenue From External Customer [Line Items]
Net sales	$ 1,173,251	$ 1,044,724	$ 2,131,667	$ 1,843,606