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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Summary of Significant Accounting Policies [Abstract] |
Costs and Estimated Earnings in Excess of Billings | ﻿
﻿ |  |  |  |  |
﻿ |  |  |  |  |
﻿ | As of December 31,
﻿(in thousands) | 2017 |  | 2016
﻿Claims | $ | 549,849 |  | $ | 477,425
﻿Unapproved change orders |  | 296,591 |  |  | 207,475
﻿Other unbilled costs and profits |  | 86,318 |  |  | 146,926
﻿Total costs and estimated earnings in excess of billings | $ | 932,758 |  | $ | 831,826
﻿
Calculations of Basic and Diluted EPS |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ | Year Ended December 31,
﻿(in thousands, except per common share data) | 2017 |  | 2016 |  | 2015
﻿Net income attributable to Tutor Perini Corporation | $ | 148,382 |  | $ | 95,822 |  | $ | 45,292
﻿ |  |  |  |  |  |  |  |
﻿Weighted-average common shares outstanding, basic |  | 49,647 |  |  | 49,150 |  |  | 48,981
﻿Effect of dilutive stock options and unvested restricted stock |  | 1,112 |  |  | 714 |  |  | 685
﻿Weighted-average common shares outstanding, diluted |  | 50,759 |  |  | 49,864 |  |  | 49,666
﻿ |  |  |  |  |  |  |  |
﻿Net income attributable to Tutor Perini Corporation per common share: |  |  |  |  |  |  |  |
﻿Basic | $ | 2.99 |  | $ | 1.95 |  | $ | 0.92
﻿Diluted | $ | 2.92 |  | $ | 1.92 |  | $ | 0.91
﻿Anti-dilutive securities not included above |  | 798 |  |  | 1,132 |  |  | 1,372
﻿
Schedule of Cash and Cash Equivalents |
﻿ |  |  |  |  |
﻿ |  |  |  |  |
﻿ | As of December 31,
﻿(in thousands) | 2017 |  | 2016
﻿Cash and cash equivalents | $ | 94,713 |  | $ | 49,539
﻿Joint venture cash and cash equivalents |  | 98,155 |  |  | 96,564
﻿Total cash and cash equivalents | $ | 192,868 |  | $ | 146,103
﻿ |  |  |  |  |
﻿
Tax Effects of Componenets of Other Comprehensive Income (Loss) |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | Year Ended December 31,
﻿ | 2017 |  | 2016 |  | 2015
﻿(in thousands) | Before-Tax Amount |  | Tax (Expense) Benefit |  | Net-of-Tax Amount |  | Before-Tax Amount |  | Tax Benefit |  | Net-of-Tax Amount |  | Before-Tax Amount |  | Tax Benefit (Expense) |  | Net-of-Tax Amount
﻿Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Defined benefit pension plan adjustments | $ | 2,416 |  | $ | (992) |  | $ | 1,424 |  | $ | (4,452) |  | $ | 1,829 |  | $ | (2,623) |  | $ | 31 |  | $ | 1,995 |  | $ | 2,026
﻿Foreign currency translation adjustment |  | 2,159 |  |  | (886) |  |  | 1,273 |  |  | (439) |  |  | 178 |  |  | (261) |  |  | (5,897) |  |  | 2,683 |  |  | (3,214)
﻿Unrealized (loss) gain in fair value of investments |  | (4) |  |  | 2 |  |  | (2) |  |  | (576) |  |  | 236 |  |  | (340) |  |  | 1,123 |  |  | (357) |  |  | 766
﻿Unrealized loss in fair value of interest rate swap |  | — |  |  | — |  |  | — |  |  | (45) |  |  | 21 |  |  | (24) |  |  | (37) |  |  | (88) |  |  | (125)
﻿Total other comprehensive income (loss) | $ | 4,571 |  | $ | (1,876) |  | $ | 2,695 |  | $ | (5,512) |  | $ | 2,264 |  | $ | (3,248) |  | $ | (4,780) |  | $ | 4,233 |  | $ | (547)
﻿Total other comprehensive income (loss) attributable to Tutor Perini Corporation | $ | 4,571 |  | $ | (1,876) |  | $ | 2,695 |  | $ | (5,512) |  | $ | 2,264 |  | $ | (3,248) |  | $ | (4,780) |  | $ | 4,233 |  | $ | (547)
﻿
Changes in AOCI Balances by Component |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿(in thousands) | Defined Benefit Pension Plan |  | Foreign Currency Translation |  | Unrealized (Loss) Gain in Fair Value of Investments |  | Unrealized Gain (Loss) in Fair Value of Interest Rate Swap |  | Accumulated Other Comprehensive Loss
﻿Attributable to Tutor Perini Corporation: |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Balance as of December 31, 2014 | $ | (40,268) |  | $ | (1,389) |  | $ | (110) |  | $ | 149 |  | $ | (41,618)
﻿Other comprehensive income (loss) |  | 2,026 |  |  | (3,214) |  |  | 766 |  |  | (125) |  |  | (547)
﻿Balance as of December 31, 2015 | $ | (38,242) |  | $ | (4,603) |  | $ | 656 |  | $ | 24 |  | $ | (42,165)
﻿Other comprehensive loss before reclassifications |  | (3,722) |  |  | (261) |  |  | (340) |  |  | (24) |  |  | (4,347)
﻿Amounts reclassified from AOCI |  | 1,099 |  |  | — |  |  | — |  |  | — |  |  | 1,099
﻿Balance as of December 31, 2016 | $ | (40,865) |  | $ | (4,864) |  | $ | 316 |  | $ | — |  | $ | (45,413)
﻿Other comprehensive income (loss) before reclassifications |  | 306 |  |  | 1,273 |  |  | (2) |  |  | — |  |  | 1,577
﻿Amounts reclassified from AOCI |  | 1,118 |  |  | — |  |  | — |  |  | — |  |  | 1,118
﻿Balance as of December 31, 2017 | $ | (39,441) |  | $ | (3,591) |  | $ | 314 |  | $ | — |  | $ | (42,718)
﻿
Schedule Of Items Reclassified Out Of AOCI And The Corresponding Location And Impact On The Consolidated Statements Of Income |
﻿ |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |
﻿ | Location in Consolidated |  | Year Ended December 31,
﻿(in thousands) | Statements of Income |  | 2017 |  | 2016 |  | 2015
﻿Defined benefit pension plan adjustments | Various accounts(a) |  | $ | 1,897 |  | $ | 1,745 |  | $ | —
﻿Income tax benefit | Income tax benefit (provision) |  |  | (779) |  |  | (646) |  |  | —
﻿Net of tax |  |  | $ | 1,118 |  | $ | 1,099 |  | $ | —
(a)Defined benefit pension plan adjustments were reclassified to cost of operations and general and administrative expenses.

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