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Share-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares authorized for grant | 1,241,879 |  |  |
Paid to settle share-based awards | $ 0 | $ 0 | $ 600 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | 0 |  |  |
Weighted average remaining contractual term of outstanding stock options | 4 years 1 month 6 days |  |  |
Number of vested and exercisable stock options (in shares) | 1,509,015 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value | $ 900 |  |  |
Vested and exercisable stock options, weighted average exercise price (in dollars per share) | $ 19.69 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term | 4 years 1 month 6 days |  |  |
Share-based compensation expense | $ 19,143 | 22,782 | 21,174 |
Share based compensation, tax benefits | 2,900 | 3,800 | 8,700 |
Employee [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense | 17,500 | 21,100 | 19,600 |
Non-employee Directors [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense | 1,600 | 1,700 | 1,600 |
Restricted Stock Units [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Fair value of restricted stock units that vested during period | 3,100 | $ 7,900 | 25,300 |
Restricted stock expense | $ 17,300 |  |  |
Weighted average period over which unrecognized compensation cost is expected to be recognized | 2 years |  |  |
Restricted Stock Units [Member] | Granted In 2019 And 2020 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares available for future grant (in shares) | 75,000 |  |  |
Stock Options [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options expiration period | 10 years |  |  |
Aggregate intrinsic value |  |  | 1,300 |
Stock Options Exercises In Period Tax Benefit |  |  | $ 600 |
Stock option expense | $ 3,600 |  |  |
Weighted average period over which unrecognized compensation cost is expected to be recognized | 1 year 9 months 18 days |  |  |
Total granted and outstanding (in shares) | 2,279,015 | 2,943,044 | 2,554,034 | 2,174,500
Aggregate Intrinsic value | $ 900 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |  |  | 140,000 |
Weighted average remaining contractual term of outstanding stock options | 5 years 6 months |  |  |
Stock options granted but not vested | 770,000 |  |  |
Stock options granted and expected to vest | 770,000 |  |  |
Stock options granted, weighted-average exercise price | $ 22.44 |  |  |
Stock options granted, weighted-average remaining contractual life | 8 years 4 months 24 days |  |  |
Stock Options [Member] | Granted In 2019 And 2020 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares available for future grant (in shares) | 75,000 |  |  |
Unrestricted Stock Units [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Fair value of unrestricted stock units issued | $ 1,500 | $ 2,500 | $ 2,600 |
Amended and Restated Tutor Perini Corporation Long-Term Incentive Plan (“Incentive Plan”) | Restricted Stock Units And Stock Options [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Aggregate number of shares outstanding, historical awards that either have not vested or have vested but not exercised | 4,144,015 |  |  |

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