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Business Segments (Reportable Segments) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 1,082,816 | $ 1,060,705 | $ 3,259,273 | $ 2,858,756
Loss from construction operations | (106,807) | (12,566) | (17,508) | (92,123)
Capital expenditures | 6,914 | 14,967 | 28,266 | 45,590
Depreciation and amortization | 13,510 | 11,231 | 41,098 | 31,985
Costs for share-based payment arrangements | 16,500 | 3,500 | 39,000 | 9,100
Costs for share-based payment arrangements, after tax | $ 12,100 | $ 2,500 | $ 28,600 | $ 6,600
Costs for share-based payment arrangements, after tax (in dollars per share) | $ 0.23 | $ 0.05 | $ 0.55 | $ 0.13
Adverse Legal Ruling Pertaining to Mixed-Use Project in New York |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss contingency |  |  |  | $ 83,600
Loss contingency, after tax |  |  |  | $ 60,100
Loss contingency, after tax, diluted (in dollars per share) |  |  |  | $ 1.16
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 1,127,427 | $ 1,086,953 | $ 3,391,687 | $ 2,905,025
Loss from construction operations | (73,351) | 8,583 | 67,988 | (34,318)
Capital expenditures | 4,528 | 12,573 | 22,696 | 41,456
Depreciation and amortization | 11,866 | 9,056 | 35,189 | 25,264
Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | (44,611) | (26,248) | (132,414) | (46,269)
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Loss from construction operations | (33,456) | (21,149) | (85,496) | (57,805)
Capital expenditures | 2,386 | 2,394 | 5,570 | 4,134
Depreciation and amortization | 1,644 | 2,175 | 5,909 | 6,721
Civil |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 545,895 | 520,494 | 1,564,548 | 1,424,487
Civil | Unfavorable Adjustment Adverse Arbitration Ruling on Bridge Project in California |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | (79,400) |  | (79,400) |
Loss contingency | 101,600 |  | 101,600 |
Loss contingency, after tax | $ 74,500 |  | $ 74,500 |
Loss contingency, after tax, diluted (in dollars per share) | $ 1.42 |  | $ 1.43 |
Civil | Unfavorable Adjustment Legal Ruling Pertaining To Mass-Transit Project In California |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss contingency |  | 23,200 |  | 23,200
Loss contingency, after tax |  | $ 16,800 |  | $ 16,800
Loss contingency, after tax, diluted (in dollars per share) |  | $ 0.32 |  | $ 0.32
Civil | Favorable Adjustment Legal Settlement on Highway Tunneling Project in the West |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gain contingency | $ 18,400 |  |  |
Gain contingency, after tax | $ 13,500 |  |  |
Gain contingency, after tax, diluted (in dollars per share) | $ 0.26 |  |  |
Civil | Favorable Adjustment Legal Ruling Pertaining To Mass-Transit Project In California |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gain contingency |  | $ 8,800 | $ 10,200 | $ 25,600
Gain contingency, after tax |  | $ 7,000 | $ 7,500 | $ 20,300
Gain contingency, after tax, diluted (in dollars per share) |  | $ 0.13 | $ 0.14 | $ 0.39
Civil | Favorable Adjustment Legal Ruling Pertaining To Mass-Transit Project In California, Remaining Work |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gain contingency |  |  |  | $ 8,800
Gain contingency, after tax |  |  |  | $ 7,000
Gain contingency, after tax, diluted (in dollars per share) |  |  |  | $ 0.14
Civil | Unfavorable Adjustment Due To Highway Project In Northeast |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss contingency |  |  | $ 12,400 |
Loss contingency, after tax |  |  | $ 9,100 |
Loss contingency, after tax, diluted (in dollars per share) |  |  | $ 0.17 |
Civil | Favorable Adjustment Legal Settlement On Highway Tunneling Project In The Northwest |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gain contingency |  |  | $ 18,400 |
Gain contingency, after tax |  |  | $ 13,500 |
Gain contingency, after tax, diluted (in dollars per share) |  |  | $ 0.26 |
Civil | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 569,080 | $ 543,776 | $ 1,649,421 | $ 1,477,553
Loss from construction operations | (12,545) | 46,889 | 133,785 | 170,308
Capital expenditures | 4,237 | 11,941 | 21,847 | 36,649
Depreciation and amortization | 10,718 | 7,698 | 31,699 | 21,753
Civil | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | (23,185) | (23,282) | (84,873) | (53,066)
Building |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 435,715 | 365,449 | 1,265,523 | 926,444
Building | Unfavorable Adjustment Adverse Legal Settlement On Government Facility Project In Florida |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss contingency | 20,000 |  | 20,000 |
Loss contingency, after tax | $ 14,700 |  | $ 14,700 |
Loss contingency, after tax, diluted (in dollars per share) | $ 0.28 |  | $ 0.28 |
Building | Adverse Legal Ruling Pertaining to Mixed-Use Project in New York |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss contingency |  |  |  | 72,200
Building | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 457,141 | 368,244 | $ 1,313,114 | 919,468
Loss from construction operations | (3,895) | 123 | 17,272 | (83,917)
Capital expenditures | 238 | 241 | 523 | 3,716
Depreciation and amortization | 579 | 743 | 1,749 | 1,655
Building | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | (21,426) | (2,795) | (47,591) | 6,976
Specialty Contractors |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 101,206 | 174,762 | 429,202 | 507,825
Specialty Contractors | Unfavorable Adjustment Legal Ruling Pertaining To Mass-Transit Project In California |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss contingency | 17,700 | 9,400 | 17,700 | 9,400
Loss contingency, after tax | $ 13,000 | $ 6,800 | $ 13,000 | $ 6,800
Loss contingency, after tax, diluted (in dollars per share) | $ 0.25 | $ 0.13 | $ 0.25 | $ 0.13
Specialty Contractors | Unfavorable Adjustment Legal Ruling Pertaining To Mass-Transit Project In New York |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss contingency | $ 11,500 |  | $ 11,500 |
Loss contingency, after tax | $ 8,400 |  | $ 8,400 |
Loss contingency, after tax, diluted (in dollars per share) | $ 0.16 |  | $ 0.16 |
Specialty Contractors | Unfavorable Adjustment due to Changes in Estimates on Transportation Project in the Northeast |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss contingency |  | $ 16,900 |  | $ 57,000
Loss contingency, after tax |  | $ 12,300 |  | $ 41,400
Loss contingency, after tax, diluted (in dollars per share) |  | $ 0.24 |  | $ 0.80
Specialty Contractors | Unfavorable Arbitration Ruling Pertaining to Electrical Project in New York |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss contingency |  |  | $ 12,000 |
Loss contingency, after tax |  |  | $ 8,800 |
Loss contingency, after tax, diluted (in dollars per share) |  |  | $ 0.17 |
Specialty Contractors | Adverse Legal Ruling Pertaining to Mixed-Use Project in New York |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss contingency |  |  |  | $ 11,400
Specialty Contractors | Unfavorable Adjustment due to Educational Facilities Project in New York |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss contingency |  |  |  | 25,100
Loss contingency, after tax |  |  |  | $ 18,200
Loss contingency, after tax, diluted (in dollars per share) |  |  |  | $ 0.35
Specialty Contractors | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 101,206 | $ 174,933 | $ 429,152 | $ 508,004
Loss from construction operations | (56,911) | (38,429) | (83,069) | (120,709)
Capital expenditures | 53 | 391 | 326 | 1,091
Depreciation and amortization | 569 | 615 | 1,741 | 1,856
Specialty Contractors | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 0 | (171) | $ 50 | (179)
Civil and Building | Unfavorable Adjustment due to Changes in Estimates on Transportation Project in the Northeast |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Loss contingency |  | 14,000 |  | 27,500
Loss contingency, after tax |  | $ 10,900 |  | $ 21,400
Loss contingency, after tax, diluted (in dollars per share) |  | $ 0.21 |  | $ 0.41

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