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Goodwill - Schedule of Change in Carrying Amount of Goodwill (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)
Goodwill [Line Items]
Balance as of December 31, 2020	$ 785,305
Acquisitions	516,600
Gypsum Divestiture	(9,924)
Balance as of September 30, 2021	3,141,594
All Other Acquisitions
Goodwill [Line Items]
Acquisitions	614,609
BMC Merger
Goodwill [Line Items]
Acquisitions	$ 1,751,604

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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- Definition

Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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