v3.26.1
SEGMENT REPORTING - Net Sales by Business Unit (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 28, 2026
Mar. 29, 2025
Revenue    
Total Net Sales $ 1,461,267 $ 1,595,519
Corporate    
Revenue    
Total Net Sales 1,980 1,890
Retail | Operating Segments    
Revenue    
Total Net Sales 531,176 607,383
Retail | Operating Segments | Deckorators    
Revenue    
Total Net Sales 68,670 65,612
Retail | Operating Segments | ProWood    
Revenue    
Total Net Sales 440,748 514,278
Retail | Operating Segments | UFP Edge    
Revenue    
Total Net Sales 21,758 27,493
Packaging | Operating Segments    
Revenue    
Total Net Sales 394,093 410,008
Packaging | Operating Segments | Structural Packaging    
Revenue    
Total Net Sales 249,293 255,982
Packaging | Operating Segments | PalletOne    
Revenue    
Total Net Sales 124,186 134,219
Packaging | Operating Segments | Protective Packaging    
Revenue    
Total Net Sales 20,614 19,807
Construction | Operating Segments    
Revenue    
Total Net Sales 465,513 515,940
Construction | Operating Segments | Factory Built    
Revenue    
Total Net Sales 193,384 217,219
Construction | Operating Segments | Site-Built    
Revenue    
Total Net Sales 150,870 190,617
Construction | Operating Segments | Commercial    
Revenue    
Total Net Sales 73,243 63,720
Construction | Operating Segments | Concrete Forming    
Revenue    
Total Net Sales 48,016 44,384
All Other | Operating Segments    
Revenue    
Total Net Sales $ 68,505 $ 60,298