XML 49 R38.htm IDEA: XBRL DOCUMENT v3.21.1
Business Combination - Pro Forma Operating Results (Detail) - BMC Stock Holdings, Inc. - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Business Acquisition [Line Items]    
Net sales $ 4,173,775 $ 2,707,900
Net income (loss) $ 231,991 $ (86,675)