Acquisitions (Details) - USD ($) $ in Thousands			12 Months Ended
	Nov. 30, 2023	Apr. 24, 2023	Dec. 31, 2023	Dec. 31, 2022	May 31, 2018
Business Acquisition [Line Items]
Goodwill			$ 155,004	$ 73,703
Expected amortization expense, year one			14,300
Expected amortization expense, year two			7,100
Expected amortization expense, year three			7,100
Expected amortization expense, year four			6,700
Expected amortization expense, year five			6,500
Expected amortization expense, thereafter			75,400
Acquisition and integration expenses			5,000
Materials
Business Acquisition [Line Items]
Goodwill			24,435	1,946
Construction
Business Acquisition [Line Items]
Goodwill			130,569	$ 71,757
The Credit Agreement
Business Acquisition [Line Items]
Credit facility capacity					$ 200,000
Revolving Credit Facility | The Credit Agreement
Business Acquisition [Line Items]
Credit facility capacity					$ 350,000
Outstanding letters of credit	$ 100,000		100,000
Secured Debt | The Term Loan | Line of Credit
Business Acquisition [Line Items]
Credit facility capacity	150,000
LRC/MSG
Business Acquisition [Line Items]
Consideration transferred	278,000
Revenue since acquisition date			7,700
Net loss before taxes since acquisition date			(2,300)
Deferred consideration	22,000
Liabilities assumed	41,109
Goodwill	80,826
Expected amortization expense, year one			13,300
Expected amortization expense, year two			6,100
Expected amortization expense, year three			6,100
Expected amortization expense, year four			6,100
Expected amortization expense, year five			6,100
Expected amortization expense, thereafter			$ 71,900
Goodwill expected to be deductible for tax purposes	80,800
LRC/MSG | Materials
Business Acquisition [Line Items]
Goodwill	17,800
LRC/MSG | Construction
Business Acquisition [Line Items]
Goodwill	$ 63,000
CMR
Business Acquisition [Line Items]
Acquisition of businesses, net of cash acquired (see Note 2)		$ 26,600
Assets acquired		28,500
Liabilities assumed		7,100
Goodwill		$ 5,100