Segment Information - Segment Sales to External Customers by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Sales to external customer [Line Items]
Sales	$ 1,831,335	$ 1,740,114	$ 3,329,949	$ 3,276,608
Building Materials Distribution
Sales to external customer [Line Items]
Sales	1,697,400	1,614,900	3,086,400	3,022,000
Wood Products
Sales to external customer [Line Items]
Sales	133,900	125,200	$ 243,600	$ 254,600
Intersegment EWP sales volumes as percentage to total EWP sales volumes			77.00%	74.00%
General line \| Building Materials Distribution
Sales to external customer [Line Items]
Sales	796,300	733,700	$ 1,421,300	$ 1,333,500
Commodity \| Building Materials Distribution
Sales to external customer [Line Items]
Sales	590,500	551,800	1,083,300	1,068,700
Engineered wood products \| Building Materials Distribution
Sales to external customer [Line Items]
Sales	310,700	329,400	581,800	619,900
LVL \| Wood Products
Sales to external customer [Line Items]
Sales	14,200	14,300	24,600	31,000
I-joists \| Wood Products
Sales to external customer [Line Items]
Sales	6,900	8,700	11,700	19,900
Other engineered wood products \| Wood Products
Sales to external customer [Line Items]
Sales	3,000	5,700	5,100	12,500
Plywood and veneer \| Wood Products
Sales to external customer [Line Items]
Sales	72,700	61,600	131,900	121,400
Lumber \| Wood Products
Sales to external customer [Line Items]
Sales	13,400	12,600	25,600	25,200
Byproducts \| Wood Products
Sales to external customer [Line Items]
Sales	15,700	15,800	31,100	31,500
Other \| Wood Products
Sales to external customer [Line Items]
Sales	$ 8,000	$ 6,500	$ 13,600	$ 13,000