Related Party Transactions - Narrative (Details) shares in Thousands, $ in Millions	3 Months Ended			12 Months Ended
	Mar. 31, 2024 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($) shares	Dec. 31, 2023 USD ($) employee	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2023 CAD ($) employee	Dec. 31, 2022 CAD ($)
Related Party Transaction [Line Items]
Revenue				$ 11,995,934,000	$ 9,778,038,000	$ 7,951,781,000
Accounts receivable, net of allowance				1,370,074,000	1,399,732,000
Equity method investments, net investment				$ 319,000,000	306,000,000
Ownership interest				25.00%			25.00%
Consideration transferred				$ 3,700,000	900,000
Equity method investments, equity contributions				300,000
Negative equity method investment				1,200,000	200,000
Line of credit facility, letters of credit issued				82,100,000	166,700,000
Payments of acquisition-related contingent consideration				21,638,000	35,149,000	21,675,000
Outstanding receivable				$ 418,485,000	409,157,000
Noncontrolling interest, percentage of voting interests acquired				15.00%			15.00%
Payments to noncontrolling interests				$ 14,478,000	728,000	$ 8,965,000
2021 Acquisitions
Related Party Transaction [Line Items]
Noncontrolling interest, percentage of voting interests acquired						15.00%
Payments to noncontrolling interests						$ 6,800,000
2023 Acquisitions
Related Party Transaction [Line Items]
Business acquisition, number of shares issued (in shares) | shares			120
Payments to noncontrolling interests			$ 10,000,000
2023 Acquisitions | Oil and Gas
Related Party Transaction [Line Items]
Business acquisition, equity interest issued or issuable, value assigned			$ 11,600,000
Subcontracting Arrangements | Subsequent Event
Related Party Transaction [Line Items]
Payments to acquire ownership interest in minority interest	$ 700,000
Construction Services
Related Party Transaction [Line Items]
Payments of acquisition-related contingent consideration		$ 16,100,000
Management
Related Party Transaction [Line Items]
Financing receivable				7,100,000
Outstanding receivable				$ 6,900,000
Interest rate				5.00%			5.00%
Management | Subcontracting Arrangements
Related Party Transaction [Line Items]
Payments, related party				$ 8,700,000	200,000	90,300,000
Number of management members, subcontracting arrangement | employee				2			2
Charges, related party				$ 800,000
Management | Subcontracting Arrangements | Line of Credit
Related Party Transaction [Line Items]
Line of credit facility, letters of credit issued				15,000,000
Management | Subcontracting Arrangements | 2021 Acquisitions
Related Party Transaction [Line Items]
Payments, related party				5,400,000	1,500,000
Revenue				163,200,000	128,400,000
Receivables, related party				57,700,000	42,000,000
Management | Subcontracting Arrangement Two
Related Party Transaction [Line Items]
Receivables, net of deferred revenue, related party					2,300,000
Immediate Family Member of Management | Equipment | CCI
Related Party Transaction [Line Items]
Payments, net of rebates, related party				7,300,000	4,000,000	23,200,000
Immediate Family Member of Management | Construction Services
Related Party Transaction [Line Items]
Percentage of earn out payment paid		25.00%
Chairman, Board of Directors | Leases
Related Party Transaction [Line Items]
Payments, related party				2,700,000	2,600,000	2,600,000
Executive Officers | Former Owner
Related Party Transaction [Line Items]
Receivables, related party				2,600,000	2,000,000
Equity method investments, net investment				600,000	1,500,000	1,500,000
Executive Officers | Construction Services
Related Party Transaction [Line Items]
Payments, related party				1,200,000	500,000	600,000
Payables, related party				0	0
Payments, net of rebates, related party				$ 10,700,000
Proportionately Consolidated Non-Controlled Joint Venture | Canadian Joint Venture
Related Party Transaction [Line Items]
Proportionately consolidated non-controlled joint venture, ownership percentage				35.00%			35.00%
Proportionately Consolidated Non-Controlled Joint Venture | Performance and Payment Bonds
Related Party Transaction [Line Items]
Outstanding bonds, amount				$ 7,300,000	7,100,000		$ 9.7	$ 9.7
Related Party | Equipment, Supplies And Services
Related Party Transaction [Line Items]
Payments, related party				42,500,000	35,000,000	81,200,000
Payables, related party				2,700,000	2,600,000
Revenue				14,000,000	10,400,000	4,200,000
Liability				(400,000)
Receivables, related party					3,200,000
Related Party | Equipment
Related Party Transaction [Line Items]
Revenue				0	300,000
Related Party | Equipment | CCI
Related Party Transaction [Line Items]
Payables, related party				4,600,000	600,000
Accounts receivable, net of allowance				0
Related Party | Subcontracting Arrangements
Related Party Transaction [Line Items]
Payables, related party				1,100,000	300,000
Revenue					1,100,000	1,200,000
Receivables, related party				400,000	400,000
Charges, related party					$ 800,000	$ 800,000
Related Party | Leases
Related Party Transaction [Line Items]
Payables, related party				200,000
Related Party | Construction Services
Related Party Transaction [Line Items]
Receivables, related party				4,100,000
Related Customer | Subcontracting Arrangements
Related Party Transaction [Line Items]
Payables, related party				$ 3,100,000