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Business Segments (Tables) | 6 Months Ended
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Jun. 30, 2017
Business Segments [Abstract] |
Reportable Segments |
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﻿ | Reportable Segments |  |  |  |  |  |
﻿ |  |  |  |  |  |  | Specialty |  |  |  |  |  |  |  | Consolidated
﻿(in thousands) | Civil |  |  | Building |  | Contractors |  | Total |  | Corporate |  | Total
﻿Three Months Ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Total revenue | $ | 538,552 |  | $ | 508,769 |  | $ | 281,857 |  | $ | 1,329,178 |  | $ | — |  | $ | 1,329,178
﻿Elimination of intersegment revenue |  | (65,970) |  |  | (15,934) |  |  | — |  |  | (81,904) |  |  | — |  |  | (81,904)
﻿Revenue from external customers | $ | 472,582 |  | $ | 492,835 |  | $ | 281,857 |  | $ | 1,247,274 |  | $ | — |  | $ | 1,247,274
﻿Income from construction operations | $ | 58,144 |  | $ | 5,736 |  | $ | (14,007) |  | $ | 49,873 |  | $ | (15,828) | (a) | $ | 34,045
﻿Capital expenditures | $ | 1,850 |  | $ | 104 |  | $ | 286 |  | $ | 2,240 |  | $ | 271 |  | $ | 2,511
﻿Depreciation and amortization (b) | $ | 5,236 |  | $ | 513 |  | $ | 1,193 |  | $ | 6,942 |  | $ | 2,820 |  | $ | 9,762
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﻿Three Months Ended June 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Total revenue | $ | 504,930 |  | $ | 546,157 |  | $ | 318,902 |  | $ | 1,369,989 |  | $ | — |  | $ | 1,369,989
﻿Elimination of intersegment revenue |  | (39,223) |  |  | (22,636) |  |  | — |  |  | (61,859) |  |  | — |  |  | (61,859)
﻿Revenue from external customers | $ | 465,707 |  | $ | 523,521 |  | $ | 318,902 |  | $ | 1,308,130 |  | $ | — |  | $ | 1,308,130
﻿Income from construction operations | $ | 45,056 |  | $ | 13,223 |  | $ | 5,413 |  | $ | 63,692 |  | $ | (14,863) | (a) | $ | 48,829
﻿Capital expenditures | $ | 3,545 |  | $ | 81 |  | $ | 119 |  | $ | 3,745 |  | $ | 124 |  | $ | 3,869
﻿Depreciation and amortization (b) | $ | 12,447 |  | $ | 549 |  | $ | 1,263 |  | $ | 14,259 |  | $ | 2,887 |  | $ | 17,146
____________________________________________________________________________________________________ (a)Consists primarily of corporate general and administrative expenses.
| (b) |  | Depreciation and amortization is included in income from construction operations.
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﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | Reportable Segments |  |  |  |  |  |
﻿ |  |  |  |  |  |  | Specialty |  |  |  |  |  |  |  | Consolidated
﻿(in thousands) | Civil |  |  | Building |  | Contractors |  | Total |  | Corporate |  | Total
﻿Six Months Ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Total revenue | $ | 905,363 |  | $ | 1,019,936 |  | $ | 597,553 |  | $ | 2,522,852 |  | $ | — |  | $ | 2,522,852
﻿Elimination of intersegment revenue |  | (128,206) |  |  | (30,011) |  |  | — |  |  | (158,217) |  |  | — |  |  | (158,217)
﻿Revenue from external customers | $ | 777,157 |  | $ | 989,925 |  | $ | 597,553 |  | $ | 2,364,635 |  | $ | — |  | $ | 2,364,635
﻿Income from construction operations | $ | 90,032 |  | $ | 10,977 |  | $ | 755 |  | $ | 101,764 |  | $ | (30,702) | (a) | $ | 71,062
﻿Capital expenditures | $ | 7,417 |  | $ | 148 |  | $ | 293 |  | $ | 7,858 |  | $ | 325 |  | $ | 8,183
﻿Depreciation and amortization (b) | $ | 21,554 |  | $ | 1,031 |  | $ | 2,385 |  | $ | 24,970 |  | $ | 5,788 |  | $ | 30,758
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﻿Six Months Ended June 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Total revenue | $ | 872,431 |  | $ | 1,034,151 |  | $ | 600,675 |  | $ | 2,507,257 |  | $ | — |  | $ | 2,507,257
﻿Elimination of intersegment revenue |  | (70,866) |  |  | (42,892) |  |  | — |  |  | (113,758) |  |  | — |  |  | (113,758)
﻿Revenue from external customers | $ | 801,565 |  | $ | 991,259 |  | $ | 600,675 |  | $ | 2,393,499 |  | $ | — |  | $ | 2,393,499
﻿Income from construction operations | $ | 78,721 |  | $ | 25,673 |  | $ | 14,826 |  | $ | 119,220 |  | $ | (30,269) | (a) | $ | 88,951
﻿Capital expenditures | $ | 7,157 |  | $ | 302 |  | $ | 744 |  | $ | 8,203 |  | $ | 478 |  | $ | 8,681
﻿Depreciation and amortization (b) | $ | 20,531 |  | $ | 1,106 |  | $ | 2,568 |  | $ | 24,205 |  | $ | 5,751 |  | $ | 29,956
____________________________________________________________________________________________________ (a)Consists primarily of corporate general and administrative expenses. (b)Depreciation and amortization is included in income from construction operations.
Reconciliation of Segment Results to Consolidated Income Before Income Taxes |
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﻿ | Three Months Ended June 30, |  | Six Months Ended June 30,
﻿(in thousands) | 2017 |  | 2016 |  | 2017 |  | 2016
﻿Income from construction operations | $ | 34,045 |  | $ | 48,829 |  | $ | 71,062 |  | $ | 88,951
﻿Other income, net |  | 40,990 |  |  | 2,485 |  |  | 41,406 |  |  | 3,166
﻿Interest expense |  | (22,519) |  |  | (15,534) |  |  | (38,083) |  |  | (29,614)
﻿Income before income taxes | $ | 52,516 |  | $ | 35,780 |  | $ | 74,385 |  | $ | 62,503
﻿
Schedule of Assets by Segment |
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﻿(in thousands) | June 30, 2017 |  | December 31, 2016
﻿Civil | $ | 2,311,858 |  | $ | 2,152,123
﻿Building |  | 878,501 |  |  | 917,317
﻿Specialty Contractors |  | 844,919 |  |  | 813,851
﻿Corporate and other (a) |  | 129,588 |  |  | 155,329
﻿Total assets | $ | 4,164,866 |  | $ | 4,038,620
____________________________________________________________________________________________________ Consists principally of cash, equipment, tax-related assets and insurance-related assets, offset by the elimination of assets related to intersegment revenue.

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8736-108599 + Details
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