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v3.25.1

Acquisitions - Narrative (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 17, 2024 USD ($) shares | Mar. 31, 2025 USD ($) shares | Mar. 31, 2024 USD ($) | Mar. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) business shares
Business Acquisition [Line Items] |  |  |  |  |
Contingent consideration, liability |  | $ 387,591 |  | $ 387,591 | $ 344,984
Cash consideration paid, net of cash acquired |  | 394,263 | $ 384,071 |  |
Intangible assets |  | 207,389 |  |  |
Acquisitions, Multiple Periods |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Contingent consideration payments (up to) |  | 689,600 |  | 689,600 |
Net tangible assets acquired |  |  |  | 576,100 |
Intangible assets |  |  |  | 935,600 |
Goodwill, acquired during period |  |  |  | 1,290,000 |
2025 Acquisitions |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration |  | 389,373 |  |  |
Value of Quanta common stock issued |  | 161,554 |  |  |
Contingent consideration, liability |  | 38,342 |  | 38,342 |
Fair value of total consideration transferred or estimated to be transferred |  | 589,269 |  |  |
Goodwill expected to be deductible for income tax |  | 226,400 |  | 226,400 |
Revenues included in consolidated results of operations |  | 96,900 |  |  |
Income (loss) before taxes |  | 3,500 |  |  |
Amortization expense |  | 7,900 |  |  |
Civil Solutions and Electric Engineering Acquisitions |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration |  | $ 389,400 |  |  |
Number of shares granted for acquired companies (in shares) | shares |  | 515,822 |  |  |
Value of Quanta common stock issued |  | $ 161,600 |  |  |
Contingent consideration payments (up to) |  | $ 109,400 |  | $ 109,400 |
Business combination, period for performance targets to be achieved (in years) |  | 3 years |  |  |
2024 Acquisitions |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Revenues included in consolidated results of operations |  |  | 67,700 |  |
Income (loss) before taxes |  |  | (3,200) |  |
Amortization expense |  |  | $ 4,800 |  |
CEI |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of shares granted for acquired companies (in shares) | shares | 882,926 |  |  |  |
Value of Quanta common stock issued | $ 216,300 |  |  |  |
Contingent consideration payments (up to) | $ 200,000 |  |  |  |
Business combination, period for performance targets to be achieved (in years) | 3 years |  |  |  |
Contingent consideration, liability | $ 164,000 |  |  |  |
Fair value of total consideration transferred or estimated to be transferred | 2,040,000 |  |  |  |
Aggregate cash consideration paid | 1,650,000 |  |  |  |
Cash consideration paid, net of cash acquired | $ 1,240,000 |  |  |  |
Percentage of contingent consideration that can be paid in common stock | 10.00% |  |  |  |
2024 Acquisitions, Excluding CEI Acquisition |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration |  |  |  |  | $ 540,900
Number of shares granted for acquired companies (in shares) | shares |  |  |  |  | 334,472
Value of Quanta common stock issued |  |  |  |  | $ 74,800
Contingent consideration, liability |  |  |  |  | $ 24,300
Number of businesses acquired | business |  |  |  |  | 7

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