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Business Combinations and Dispositions - Unaudited Pro Forma Operating Results (Detail) - BMC Stock Holdings, Inc. - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Business Acquisition [Line Items]    
Net sales $ 19,893,856 $ 12,766,114
Net income $ 1,874,632 $ 240,699