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Revenue (Tables)
 12 Months Ended
Dec. 31, 2024
Revenue from Contract with Customer [Abstract]  
Schedule of Disaggregation of Revenue
The following tables disaggregate revenue by 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 years ended December 31, 2024, 2023 and 2022.
Year Ended December 31,
(in thousands)202420232022
Civil segment revenue by end market:
Mass transit (includes certain transportation and tunneling projects)$1,126,830 $1,079,629 $1,026,589 
Military facilities436,511 348,133 258,028 
Bridges(a)
170,069 204,029 265,130 
Commercial and industrial sites133,797 118,880 70,708 
Power and energy129,848 70,658 46,770 
Other121,898 62,536 67,657 
Total Civil segment revenue$2,118,953 $1,883,865 $1,734,882 
Year Ended December 31,
(in thousands)202420232022
Building segment revenue by end market:
Healthcare facilities$590,845 $294,667 $178,997 
Government407,931 424,130 329,661 
Education facilities285,207 226,335 140,514 
Mass transit (includes transportation projects)218,396 188,335 132,836 
Commercial and industrial facilities22,143 77,118 251,849 
Other(b)
93,015 91,954 208,714 
Total Building segment revenue$1,617,537 $1,302,539 $1,242,571 
Year Ended December 31,
(in thousands)202420232022
Specialty Contractors segment revenue by end market:
Mass transit (includes certain transportation and tunneling projects)$167,287 $119,760 $350,005 
Commercial and industrial facilities115,471 213,003 166,286 
Multi-unit residential84,978 114,516 112,944 
Government80,242 89,031 61,424 
Healthcare facilities64,292 57,292 23,001 
Water50,450 85,176 79,553 
Other(b)
27,712 15,045 20,089 
Total Specialty Contractors segment revenue$590,432 $693,823 $813,302 
Year Ended December 31, 2024
(in thousands)CivilBuildingSpecialty
Contractors		Total
Revenue by customer type:
State and local agencies(a)
$1,348,842 $867,638 $287,052 $2,503,532 
Federal agencies458,366 167,786 (4,122)622,030 
Private owners
311,745 582,113 307,502 1,201,360 
Total revenue$2,118,953 $1,617,537 $590,432 $4,326,922 
Year Ended December 31, 2023
(in thousands)CivilBuildingSpecialty
Contractors		Total
Revenue by customer type:
State and local agencies$1,250,740 $718,106 $316,473 $2,285,319 
Federal agencies400,782 187,199 (14,306)573,675 
Private owners(b)
232,343 397,234 391,656 1,021,233 
Total revenue$1,883,865 $1,302,539 $693,823 $3,880,227 
Year Ended December 31, 2022
(in thousands)CivilBuildingSpecialty
Contractors		Total
Revenue by customer type:
State and local agencies$1,273,639 $461,193 $332,176 $2,067,008 
Federal agencies313,791 168,307 22,705 504,803 
Private owners147,452 613,071 458,421 1,218,944 
Total revenue$1,734,882 $1,242,571 $813,302 $3,790,755 
___________________________________________________________________________________________________
(a)The year ended December 31, 2024 includes 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 14, Business Segments, for additional details.
(b)The year ended December 31, 2023 includes the negative impact of a non-cash charge of $83.6 million that resulted from an adverse legal ruling (of which $72.2 million impacted the Building segment and $11.4 million impacted the Specialty Contractors segment). Refer to Note 14, Business Segments, for additional details.
Year Ended December 31, 2024
(in thousands)CivilBuildingSpecialty
Contractors		Total
Revenue by contract type:
Fixed price(a)
$1,791,858 $638,938 $479,173 $2,909,969 
Guaranteed maximum price
715 810,697 6,688 818,100 
Unit price272,579 — 74,102 346,681 
Cost plus fee and other53,801 167,902 30,469 252,172 
Total revenue$2,118,953 $1,617,537 $590,432 $4,326,922 
Year Ended December 31, 2023
(in thousands)CivilBuildingSpecialty
Contractors		Total
Revenue by contract type:
Fixed price$1,618,081 $532,950 $577,144 $2,728,175 
Guaranteed maximum price(b)
(3,184)532,538 783 530,137 
Unit price235,085 — 91,992 327,077 
Cost plus fee and other33,883 237,051 23,904 294,838 
Total revenue$1,883,865 $1,302,539 $693,823 $3,880,227 
Year Ended December 31, 2022
(in thousands)CivilBuildingSpecialty
Contractors		Total
Revenue by contract type:
Fixed price$1,441,547 $349,318 $675,461 $2,466,326 
Guaranteed maximum price1,142 595,907 15,875 612,924 
Unit price274,293 33 85,574 359,900 
Cost plus fee and other17,900 297,313 36,392 351,605 
Total revenue$1,734,882 $1,242,571 $813,302 $3,790,755 
____________________________________________________________________________________________________
(a)The year ended December 31, 2024 includes 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 14, Business Segments, for additional details.
(b)The year ended December 31, 2023 includes the negative impact of a non-cash charge of $83.6 million that resulted from an adverse legal ruling (of which $72.2 million impacted the Building segment and $11.4 million impacted the Specialty Contractors segment). Refer to Note 14, Business Segments, for additional details.