Business Combinations - Additional Information (Detail) - USD ($) $ in Thousands		6 Months Ended
	Aug. 01, 2022	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed intangible assets including goodwill		$ 16,000
Goodwill		994,155		$ 993,995
Goodwill, expected tax deductible amount		$ 6,700
Acquired finite lived intangible assets weighted average useful life		11 years 7 months 6 days
Customer Relationships [Member]
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed intangible assets other than goodwill		$ 7,300
Acquired finite lived intangible asset useful life		12 years
Proprietary Knowledge [Member]
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed intangible assets other than goodwill		$ 1,100
Acquired finite lived intangible asset useful life		10 years
Trademarks [Member]
Business Acquisition [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed intangible assets other than goodwill		$ 900
Acquired finite lived intangible asset useful life		10 years
INTEX Millwork Solutions, LLC
Business Acquisition [Line Items]
Date of acquisition	Aug. 01, 2022
Purchase price	$ 25,900	$ 25,892
Payments to acquire businesses, cash	20,100
Contingent consideration	$ 5,800		$ 6,200
Business combination, recognized identifiable assets acquired and liabilities assumed intangible assets other than goodwill		9,300
Goodwill		$ 6,717