Acquisitions - Additional Information (Detail) $ in Millions			3 Months Ended
	Dec. 31, 2021 USD ($)	Oct. 31, 2021 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jan. 01, 2022 USD ($)	Nov. 01, 2021 USD ($) Location	Mar. 31, 2021 USD ($)
Business Acquisition [Line Items]
Business acquisitions purchase price allocation goodwill amount	$ 1,777.4		$ 1,776.7	$ 1,777.4			$ 1,761.3
Midway Sales & Distributing, Inc. [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired						100.00%
Number of business locations acquired | Location						10
Business acquisition, sales reported by acquired entity for last annual period		$ 130.0
Business acquisitions purchase price allocation goodwill amount						$ 28.7
Business acquisition, goodwill, tax deductible amount						$ 28.7
Business acquisitions purchase price allocation intangible assets other than goodwill			38.5
Transaction costs				$ 0.4
Crabtree Siding and Supply [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired					100.00%
Business acquisition, sales reported by acquired entity for last annual period	$ 1.0
Business acquisitions purchase price allocation goodwill amount					$ 0.2
Lowry's Inc [Member] | Selling, General and Administrative Expense [Member]
Business Acquisition [Line Items]
Gain resulting from release of indemnity holdback liability			$ 0.9