Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 03, 2026	Dec. 28, 2024	Dec. 30, 2023
Disaggregation of Revenue [Line Items]
Net sales	$ 2,954,007	$ 2,952,532	$ 3,136,381
Cost of sales	2,502,379	2,463,393	2,609,364
Warehouse and reload
Disaggregation of Revenue [Line Items]
Net sales	2,454,565	2,432,820	2,663,107
Direct
Disaggregation of Revenue [Line Items]
Net sales	563,459	581,517	535,163
Cash discounts and rebates
Disaggregation of Revenue [Line Items]
Net sales	(64,017)	(61,805)	(61,889)
Specialty products
Disaggregation of Revenue [Line Items]
Net sales	2,052,990	2,045,910	2,184,240
Structural products
Disaggregation of Revenue [Line Items]
Net sales	901,017	906,622	952,141
Shipping and handling
Disaggregation of Revenue [Line Items]
Cost of sales	$ 165,900	$ 154,300	$ 152,300