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Business Segments (Narrative) (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 USD ($) $ / shares | Sep. 30, 2016 USD ($) $ / shares | Jun. 30, 2016 USD ($) $ / shares | Mar. 31, 2016 USD ($) $ / shares | Dec. 31, 2015 USD ($) $ / shares | Sep. 30, 2015 USD ($) $ / shares | Jun. 30, 2015 USD ($) $ / shares | Mar. 31, 2015 USD ($) $ / shares | Dec. 31, 2016 USD ($) segment $ / shares | Dec. 31, 2015 USD ($) $ / shares | Dec. 31, 2014 USD ($) item $ / shares
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of basic segments | segment |  |  |  |  |  |  |  |  | 3 |  |
Income from construction operations | $ 52,050 | $ 60,919 | $ 48,829 | $ 40,122 | $ 15,474 | $ 38,974 | $ 30,881 | $ 20,084 | $ 201,920 | $ 105,413 | $ 241,690
DILUTED EARNINGS PER COMMON SHARE | $ / shares | $ 0.60 | $ 0.57 | $ 0.43 | $ 0.31 | $ 0.18 | $ 0.40 | $ 0.24 | $ 0.10 | $ 1.92 | $ 0.91 | $ 2.20
Tutor Perini Corporation [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income from construction operations |  |  |  |  |  |  |  |  | $ 30,589 | $ 68,595 | $ 70,574
Building [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income from construction operations |  |  |  |  |  |  |  |  | 51,564 | (1,240) | 24,697
Building [Member] | Unfavorable Adjustments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income from construction operations |  |  |  |  |  |  |  |  |  | $ (24,300) |
DILUTED EARNINGS PER COMMON SHARE | $ / shares |  |  |  |  |  |  |  |  |  | $ (0.28) |
Building [Member] | Favorable Adjustments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income from construction operations |  |  |  |  |  |  |  |  |  |  | $ 11,400
DILUTED EARNINGS PER COMMON SHARE | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.14
Civil [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of projects | item |  |  |  |  |  |  |  |  |  |  | 2
Income from construction operations |  |  |  |  |  |  |  |  | 172,668 | $ 145,213 | $ 220,554
Civil [Member] | Unfavorable Adjustments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income from construction operations |  |  |  |  |  |  |  |  |  | $ (23,900) | $ (9,400)
DILUTED EARNINGS PER COMMON SHARE | $ / shares |  |  |  |  |  |  |  |  |  | $ (0.28) | $ (0.11)
Civil [Member] | Favorable Adjustments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income from construction operations |  |  |  |  |  |  |  |  |  |  | $ 25,900
DILUTED EARNINGS PER COMMON SHARE | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.30
Civil Runway Reconstruction Project [Member] | Unfavorable Adjustments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income from construction operations |  |  |  |  |  |  |  |  |  | $ (13,700) |
DILUTED EARNINGS PER COMMON SHARE | $ / shares |  |  |  |  |  |  |  |  |  | $ (0.16) |
Specialty Contractors [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income from construction operations |  |  |  |  |  |  |  |  | 37,908 | $ 15,682 | $ 50,998
Specialty Contractors [Member] | Unfavorable Adjustments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income from construction operations |  |  |  |  |  |  |  |  | $ (13,800) |  |
DILUTED EARNINGS PER COMMON SHARE | $ / shares |  |  |  |  |  |  |  |  | $ (0.16) |  |
Specialty Contractors [Member] | Favorable Adjustments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income from construction operations |  |  |  |  |  |  |  |  | $ 14,000 |  |
DILUTED EARNINGS PER COMMON SHARE | $ / shares |  |  |  |  |  |  |  |  | $ 0.17 |  |
Five Star Electric [Member] | Unfavorable Adjustments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income from construction operations |  |  |  |  |  |  |  |  |  | $ (45,600) |
DILUTED EARNINGS PER COMMON SHARE | $ / shares |  |  |  |  |  |  |  |  |  | $ (0.53) |

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