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Revenue (Tables) | 9 Months Ended
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Sep. 30, 2025
Revenue from Contract with Customer [Abstract] |
Schedule of Disaggregation of Revenue and Revenue by Contract Type | The following tables disaggregate revenue by segment, end market, customer type and contract type, which the Company believes best depict how the nature, amount, timing and uncertainty of its revenue and cash flows are affected by economic factors for the three and nine months ended September 30, 2025 and 2024.
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
(in thousands) |  | 2025 |  | 2024 |  | 2025 |  | 2024
Civil segment revenue by end market: |  |  |  |  |  |  |  |
Mass transit (includes certain transportation and tunneling projects) |  | $ | 466,226 |  |  | $ | 341,827 |  |  | $ | 1,240,094 |  |  | $ | 883,930 |
Military facilities |  | 86,696 |  |  | 110,214 |  |  | 289,383 |  |  | 333,137 |
Bridges(a) |  | 122,081 |  |  | 1,539 |  |  | 278,015 |  |  | 91,519 |
Detention facilities |  | 31,818 |  |  | 22,216 |  |  | 116,531 |  |  | 29,088 |
Power and energy |  | 40,288 |  |  | 34,456 |  |  | 108,956 |  |  | 96,382 |
Commercial and industrial sites |  | 19,745 |  |  | 31,463 |  |  | 67,053 |  |  | 107,583 |
Other |  | 3,380 |  |  | 4,180 |  |  | 14,430 |  |  | 22,909 |
Total Civil segment revenue |  | $ | 770,234 |  |  | $ | 545,895 |  |  | $ | 2,114,462 |  |  | $ | 1,564,548 |
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
(in thousands) |  | 2025 |  | 2024 |  | 2025 |  | 2024
Building segment revenue by end market: |  |  |  |  |  |  |  |
Healthcare facilities |  | $ | 224,392 |  |  | $ | 160,904 |  |  | $ | 672,366 |  |  | $ | 408,845 |
Detention facilities |  | 99,129 |  |  | 49,762 |  |  | 263,044 |  |  | 108,302 |
Government |  | 28,864 |  |  | 61,278 |  |  | 151,985 |  |  | 247,467 |
Education facilities |  | 25,578 |  |  | 74,624 |  |  | 110,329 |  |  | 226,973 |
Mass transit (includes transportation projects) |  | 25,615 |  |  | 64,861 |  |  | 90,843 |  |  | 183,359 |
Other |  | 15,086 |  |  | 24,286 |  |  | 51,963 |  |  | 90,577 |
Total Building segment revenue |  | $ | 418,664 |  |  | $ | 435,715 |  |  | $ | 1,340,530 |  |  | $ | 1,265,523 |
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
(in thousands) |  | 2025 |  | 2024 |  | 2025 |  | 2024
Specialty Contractors segment revenue by end market: |  |  |  |  |  |  |  |
Mass transit (includes certain transportation and tunneling projects) |  | $ | 75,648 |  |  | $ | 22,674 |  |  | $ | 174,416 |  |  | $ | 119,626 |
Commercial and industrial facilities |  | 39,628 |  |  | 27,811 |  |  | 105,394 |  |  | 86,234 |
Multi-unit residential |  | 27,941 |  |  | 16,623 |  |  | 76,427 |  |  | 61,647 |
Healthcare facilities |  | 27,424 |  |  | 15,566 |  |  | 71,881 |  |  | 46,994 |
Government |  | 20,071 |  |  | 13,815 |  |  | 63,883 |  |  | 54,839 |
Detention facilities |  | 12,714 |  |  | 209 |  |  | 25,096 |  |  | 629 |
Water |  | 4,493 |  |  | 10,544 |  |  | 20,789 |  |  | 39,462 |
Education facilities |  | 5,812 |  |  | 8,566 |  |  | 13,937 |  |  | 22,828 |
Other |  | 12,731 |  |  | (14,602) |  |  | 28,859 |  |  | (3,057) |
Total Specialty Contractors segment revenue |  | $ | 226,462 |  |  | $ | 101,206 |  |  | $ | 580,682 |  |  | $ | 429,202 |
| Three Months Ended September 30, 2025 |  | Three Months Ended September 30, 2024
(in thousands) | Civil | Building | Specialty Contractors | Total |  | Civil | Building | Specialty Contractors | Total
Revenue by customer type: |  |  |  |  |
State and local agencies(a) | $ | 601,597 |  | $ | 181,817 |  | $ | 136,577 |  | $ | 919,991 |  |  | $ | 325,543 |  | $ | 241,584 |  | $ | 43,114 |  | $ | 610,241 |
Federal agencies | 117,852 |  | 23,721 |  | 6,002 |  | 147,575 |  |  | 137,110 |  | 40,616 |  | (4,090) |  | 173,636 |
Private owners | 50,785 |  | 213,126 |  | 83,883 |  | 347,794 |  |  | 83,242 |  | 153,515 |  | 62,182 |  | 298,939 |
Total revenue | $ | 770,234 |  | $ | 418,664 |  | $ | 226,462 |  | $ | 1,415,360 |  |  | $ | 545,895 |  | $ | 435,715 |  | $ | 101,206 |  | $ | 1,082,816 |
| Nine Months Ended September 30, 2025 |  | Nine Months Ended September 30, 2024
(in thousands) | Civil | Building | Specialty Contractors | Total |  | Civil | Building | Specialty Contractors | Total
Revenue by customer type: |  |  |  |  |
State and local agencies(a) | $ | 1,589,534 |  | $ | 613,772 |  | $ | 319,666 |  | $ | 2,522,972 |  |  | $ | 955,157 |  | $ | 736,220 |  | $ | 203,194 |  | $ | 1,894,571 |
Federal agencies | 353,606 |  | 95,186 |  | 11,168 |  | 459,960 |  |  | 369,876 |  | 132,753 |  | (3,312) |  | 499,317 |
Private owners | 171,322 |  | 631,572 |  | 249,848 |  | 1,052,742 |  |  | 239,515 |  | 396,550 |  | 229,320 |  | 865,385 |
Total revenue | $ | 2,114,462 |  | $ | 1,340,530 |  | $ | 580,682 |  | $ | 4,035,674 |  |  | $ | 1,564,548 |  | $ | 1,265,523 |  | $ | 429,202 |  | $ | 3,259,273 |
| Three Months Ended September 30, 2025 |  | Three Months Ended September 30, 2024
(in thousands) | Civil | Building | Specialty Contractors | Total |  | Civil | Building | Specialty Contractors | Total
Revenue by contract type: |  |  |  |  |
Fixed price(a) | $ | 636,390 |  | $ | 168,226 |  | $ | 174,159 |  | $ | 978,775 |  |  | $ | 446,208 |  | $ | 211,625 |  | $ | 73,870 |  | $ | 731,703 |
Guaranteed maximum price | 82 |  | 228,445 |  | 11,417 |  | 239,944 |  |  | 420 |  | 205,184 |  | 1,640 |  | 207,244 |
Unit price | 115,858 |  | — |  | 21,170 |  | 137,028 |  |  | 90,090 |  | — |  | 16,579 |  | 106,669 |
Cost plus fee and other | 17,904 |  | 21,993 |  | 19,716 |  | 59,613 |  |  | 9,177 |  | 18,906 |  | 9,117 |  | 37,200 |
Total revenue | $ | 770,234 |  | $ | 418,664 |  | $ | 226,462 |  | $ | 1,415,360 |  |  | $ | 545,895 |  | $ | 435,715 |  | $ | 101,206 |  | $ | 1,082,816 |
| Nine Months Ended September 30, 2025 |  | Nine Months Ended September 30, 2024
(in thousands) | Civil | Building | Specialty Contractors | Total |  | Civil | Building | Specialty Contractors | Total
Revenue by contract type: |  |  |  |  |
Fixed price(a) | $ | 1,822,443 |  | $ | 546,460 |  | $ | 453,316 |  | $ | 2,822,219 |  |  | $ | 1,330,549 |  | $ | 567,821 |  | $ | 349,718 |  | $ | 2,248,088 |
Guaranteed maximum price | 304 |  | 703,520 |  | 24,235 |  | 728,059 |  |  | 554 |  | 583,127 |  | 3,200 |  | 586,881 |
Unit price | 244,170 |  | — |  | 57,724 |  | 301,894 |  |  | 199,257 |  | — |  | 57,404 |  | 256,661 |
Cost plus fee and other | 47,545 |  | 90,550 |  | 45,407 |  | 183,502 |  |  | 34,188 |  | 114,575 |  | 18,880 |  | 167,643 |
Total revenue | $ | 2,114,462 |  | $ | 1,340,530 |  | $ | 580,682 |  | $ | 4,035,674 |  |  | $ | 1,564,548 |  | $ | 1,265,523 |  | $ | 429,202 |  | $ | 3,259,273 |
____________________________________________________________________________________________________ (a)The three and nine-month periods ended September 30, 2024 include the negative impact of a $101.6 million adjustment related to an adverse arbitration ruling on a completed Civil segment bridge project in California, of which $79.4 million was a reversal of previously recognized revenue. Refer to Note 19, Business Segments, for additional details.

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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