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Business Segments (Reportable Segments) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ 1,177,725 | $ 1,189,345 | $ 1,125,275 | $ 958,487 | $ 1,183,284 | $ 1,123,137 | $ 1,120,085 | $ 1,028,156 | $ 4,450,832 |  | $ 4,454,662 | $ 4,757,208 |
Income (loss) from construction operations |  | (94,146) | 47,943 | (341,717) | 22,913 | 90,680 | 47,306 | 54,815 | (925) | (365,007) |  | 191,876 | 179,477 |
Capital Expenditures |  |  |  |  |  |  |  |  |  | 84,196 |  | 77,069 | 30,280 |
Depreciation and amortization | [1] |  |  |  |  |  |  |  |  | 65,044 |  | 47,267 | 51,930 |
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  | 379,863 |  |  |  |
Net income (loss) |  | $ (76,229) | $ 26,721 | $ (315,439) | $ 4,722 | $ 55,391 | $ 25,436 | $ 27,896 | $ (10,942) | $ (360,225) |  | $ 97,781 | $ 154,544 |
Earnings Per Share, Diluted |  | $ (1.71) | $ 0.38 | $ (6.38) | $ (0.01) | $ 0.98 | $ 0.42 | $ 0.49 | $ (0.24) | $ (7.72) |  | $ 1.66 | $ 2.92 |
Gain on remeasurement of investment in joint venture |  |  |  |  |  |  |  |  |  | $ 37,792 |  |  |  |
Intersubsegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | (297,756) |  | $ (229,342) | $ (295,521) |
External and Intersegment Customers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 4,748,588 |  | 4,684,004 | 5,052,729 |
Reportable Segments [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 4,450,832 |  | 4,454,662 | 4,757,208 |
Income (loss) from construction operations |  |  |  |  |  |  |  |  |  | (299,819) | [2] | 255,625 | 245,344 | [3]
Capital Expenditures |  |  |  |  |  |  |  |  |  | 83,362 |  | 76,298 | 28,682 |
Depreciation and amortization | [1] |  |  |  |  |  |  |  |  | 53,975 |  | 35,999 | 40,487 |
Reportable Segments [Member] | Intersubsegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | (297,756) |  | (229,342) | (295,521) |
Reportable Segments [Member] | External and Intersegment Customers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 4,748,588 |  | 4,684,004 | 5,052,729 |
Civil [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 1,779,352 |  | 1,586,093 | 1,602,175 |
Income (loss) from construction operations |  |  |  |  |  |  |  |  |  | (150,837) | [2] | 168,256 | 192,207 | [3]
Capital Expenditures |  |  |  |  |  |  |  |  |  | 82,156 |  | 73,866 | 27,694 |
Depreciation and amortization | [1] |  |  |  |  |  |  |  |  | 47,905 |  | 29,685 | 33,767 |
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  | 210,215 |  |  |  |
Civil [Member] | Intersubsegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | (274,745) |  | (224,139) | (253,989) |
Civil [Member] | External and Intersegment Customers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 2,054,097 |  | 1,810,232 | 1,856,164 |
Building [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 1,742,040 |  | 1,861,699 | 1,941,325 |
Income (loss) from construction operations |  |  |  |  |  |  |  |  |  | 23,655 | [2] | 43,939 | 34,199 | [3]
Capital Expenditures |  |  |  |  |  |  |  |  |  | 518 |  | 1,655 | 267 |
Depreciation and amortization | [1] |  |  |  |  |  |  |  |  | 1,934 |  | 1,956 | 2,021 |
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  | 13,455 |  |  |  |
Building [Member] | Intersubsegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | (22,713) |  | (5,203) | (41,532) |
Building [Member] | External and Intersegment Customers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 1,764,753 |  | 1,866,902 | 1,982,857 |
Specialty Contractors [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 929,440 |  | 1,006,870 | 1,213,708 |
Income (loss) from construction operations |  |  |  |  |  |  |  |  |  | (172,637) | [2] | 43,430 | 18,938 | [3]
Capital Expenditures |  |  |  |  |  |  |  |  |  | 688 |  | 777 | 721 |
Depreciation and amortization | [1] |  |  |  |  |  |  |  |  | 4,136 |  | 4,358 | 4,699 |
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  | 156,193 |  |  |  |
Specialty Contractors [Member] | Intersubsegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | (298) |  |  |  |
Specialty Contractors [Member] | External and Intersegment Customers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 929,738 |  | 1,006,870 | 1,213,708 |
Corporate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from construction operations | [4] |  |  |  |  |  |  |  |  | (65,188) | [2] | (63,749) | (65,867) | [3]
Capital Expenditures |  |  |  |  |  |  |  |  |  | 834 |  | 771 | 1,598 |
Depreciation and amortization | [1] |  |  |  |  |  |  |  |  | 11,069 |  | 11,268 | $ 11,443 |
Unfavorable Adjustments [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  | 379,900 |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  |  | $ 330,500 |  |  |  |
Earnings Per Share, Diluted |  |  |  |  |  |  |  |  |  | $ 6.58 |  |  |  |
Unfavorable Adjustments [Member] | Alaskan Way Viaduct Matter [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from construction operations |  |  |  |  |  |  |  |  |  | $ 166,800 |  |  |  |
Income from construction operations, net of tax |  |  |  |  |  |  |  |  |  | $ 119,400 |  |  |  |
Earnings Per Share, Diluted |  |  |  |  |  |  |  |  |  | $ 2.38 |  |  |  |
Unfavorable Adjustments [Member] | Civil [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from construction operations |  |  |  |  |  |  |  |  |  |  |  | 17,800 |  |
Income from construction operations, net of tax |  |  |  |  |  |  |  |  |  |  |  | $ 12,800 |  |
Earnings Per Share, Diluted |  |  |  |  |  |  |  |  |  |  |  | $ 0.25 |  |
One-Time Gain From Remeasurement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings Per Share, Diluted |  |  |  |  |  |  |  |  |  | $ 0.54 |  |  |  |
Gain on remeasurement of investment in joint venture |  |  |  |  |  |  |  |  |  | $ 37,800 |  |  |  |
Gain on remeasurement of investment in joint venture, net of tax |  |  |  |  |  |  |  |  |  | $ 27,100 |  |  |  |
[1] | Depreciation and amortization is included in income (loss) from construction operations.(d)During the year ended December 31, 2018, the Company recorded a charge of $17.8 million in income (loss) from construction operations (an after-tax impact of $12.8 million, or $0.25 per diluted share), which was primarily non-cash, as a result of the unexpected adverse outcome of an arbitration decision related to a subcontract back charge dispute on a Civil segment project in New York that was completed in 2013.
[2] | During the year ended December 31, 2019, the Company recorded a non-cash goodwill impairment charge of $379.9 million in income (loss) from construction operations (an after-tax impact of $330.5 million, or $6.58 per diluted share) resulting from an interim impairment test the Company performed as of June 1, 2019. For further information and breakdown of the goodwill impairment charge by segment, see Note 6. In addition, during the year ended December 31, 2019 the Company recorded a charge of $166.8 million in income (loss) from construction operations (an after-tax impact of $119.4 million, or $2.38 per diluted share), which principally impacted the Civil segment, as a result of the adverse jury verdict on the Alaskan Way Viaduct Matter, as discussed in Note 8. Lastly, the Company recognized a one-time gain of $37.8 million (an after-tax impact of $27.1 million, or $0.54 per diluted share) in Civil segment general and administrative expenses related to a remeasurement of its investment in a joint venture (see Note 13).
[3] | During the year ended December 31, 2018, the Company recorded a charge of $17.8 million in income (loss) from construction operations (an after-tax impact of $12.8 million, or $0.25 per diluted share), which was primarily non-cash, as a result of the unexpected adverse outcome of an arbitration decision related to a subcontract back charge dispute on a Civil segment project in New York that was completed in 2013.
[4] | Consists primarily of corporate general and administrative expenses.

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