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ACQUISITIONS - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 02, 2020
Jul. 04, 2020
Apr. 03, 2021
Dec. 31, 2020
Dec. 31, 2019
Business Acquisition [Line Items]          
Goodwill     $ 1,195,983 $ 1,194,729 $ 1,669,594
Siding          
Business Acquisition [Line Items]          
Goodwill     $ 655,427 $ 654,821 $ 807,280
Kleary Masonry, Inc.          
Business Acquisition [Line Items]          
Percentage of outstanding interests acquired 100.00%        
Total cash consideration transferred $ 40,000        
Working capital adjustments   $ 2,000      
Goodwill 12,539        
Kleary Masonry, Inc. | Siding          
Business Acquisition [Line Items]          
Goodwill $ 12,500