Significant Accounting Policies (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies and General Information [Line Items]
Settlements with interest rate swap counterparties	$ 16,700,000	$ 4,000,000.0	$ 0
Gains on acquisition earnouts	0	(16,100,000)	(1,100,000)
Amount insured by FDIC	250,000
Impairment of long-lived assets	0	0	0
Insurance cost of claims	26,500,000	23,700,000
Advertising expenses	5,600,000	4,900,000	4,600,000
Deferred financing costs	7,900,000	10,200,000
Amortization expense related to financing costs	1,900,000	1,900,000	1,400,000
Write-off of debt issuance costs, included in interest expense	900,000	0	1,800,000
Costs incurred associated with debt-related financing transactions	100,000	700,000
Senior Secured Credit Agreement
Accounting Policies and General Information [Line Items]
Deferred financing costs	500,000	0	200,000
Write-off of debt issuance costs, included in interest expense	400,000	0	$ 1,600,000
Workers' Compensation Insurance
Accounting Policies and General Information [Line Items]
Insurance cost of claims	800,000
Vehicles Insurance
Accounting Policies and General Information [Line Items]
Insurance cost of claims	$ 1,000,000
Buildings
Accounting Policies and General Information [Line Items]
Estimated useful life	30 years
Maximum
Accounting Policies and General Information [Line Items]
Payment terms (in days)	60 days
Maximum | General Liability Insurance Program
Accounting Policies and General Information [Line Items]
Insurance cost of claims	$ 5,000,000
Aggregate cap of insurance cost of claims	$ 10,000,000
Maximum | Vehicles
Accounting Policies and General Information [Line Items]
Estimated useful life	5 years
Maximum | Leasehold improvements
Accounting Policies and General Information [Line Items]
Estimated useful life	5 years
Maximum | Furniture, fixtures and equipment
Accounting Policies and General Information [Line Items]
Estimated useful life	5 years
Minimum
Accounting Policies and General Information [Line Items]
Payment terms (in days)	30 days
Minimum | Furniture, fixtures and equipment
Accounting Policies and General Information [Line Items]
Estimated useful life	3 years
Other non-current assets
Accounting Policies and General Information [Line Items]
Retainage receivables	$ 300,000	1,000,000
Accounts Receivable
Accounting Policies and General Information [Line Items]
Accounts receivable	$ 65,200,000	$ 49,800,000
Customer relationships | Maximum
Accounting Policies and General Information [Line Items]
Estimated useful life	15 years
Customer relationships | Minimum
Accounting Policies and General Information [Line Items]
Estimated useful life	8 years
Covenants not-to-compete | Maximum
Accounting Policies and General Information [Line Items]
Estimated useful life	5 years
Covenants not-to-compete | Minimum
Accounting Policies and General Information [Line Items]
Estimated useful life	1 year
Trademarks and tradenames | Maximum
Accounting Policies and General Information [Line Items]
Estimated useful life	15 years
Trademarks and tradenames | Minimum
Accounting Policies and General Information [Line Items]
Estimated useful life	2 years
Backlog | Maximum
Accounting Policies and General Information [Line Items]
Estimated useful life	36 months
Backlog | Minimum
Accounting Policies and General Information [Line Items]
Estimated useful life	12 months