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Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2019
Other Comprehensive Income (Loss) [Abstract] |
Schedule of Tax Effects of the Components of Other Comprehensive Income (Loss) | The tax effects of the components of other comprehensive income (loss) for the three and nine months ended September 30, 2019 and 2018 were as follows:
| Three Months Ended |  | Three Months Ended
| September 30, 2019 |  | September 30, 2018
(in thousands) | Before-Tax Amount |  | Tax (Expense) Benefit |  | Net-of-Tax Amount |  | Before-Tax Amount |  | Tax (Expense) Benefit |  | Net-of-Tax Amount
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined benefit pension plan adjustments | $ | 464 |  | $ | (133) |  | $ | 331 |  | $ | 513 |  | $ | (148) |  | $ | 365
Foreign currency translation adjustments |  | (590) |  |  | 140 |  |  | (450) |  |  | 519 |  |  | (143) |  |  | 376
Unrealized gain (loss) in fair value of investments |  | 328 |  |  | (72) |  |  | 256 |  |  | (173) |  |  | 44 |  |  | (129)
Total other comprehensive income (loss) |  | 202 |  |  | (65) |  |  | 137 |  |  | 859 |  |  | (247) |  |  | 612
Less: Other comprehensive income attributable to noncontrolling interests(a) |  | (99) |  |  | — |  |  | (99) |  |  | — |  |  | — |  |  | —
Total other comprehensive income (loss) attributable to Tutor Perini Corporation | $ | 301 |  | $ | (65) |  | $ | 236 |  | $ | 859 |  | $ | (247) |  | $ | 612
____________________________________________________________________________________________________ (a)The only component of other comprehensive income attributable to noncontrolling interests is foreign currency translation.
| Nine Months Ended |  | Nine Months Ended
| September 30, 2019 |  | September 30, 2018
(in thousands) | Before-Tax Amount |  | Tax (Expense) Benefit |  | Net-of-Tax Amount |  | Before-Tax Amount |  | Tax (Expense) Benefit |  | Net-of-Tax Amount
Other comprehensive income (loss): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Defined benefit pension plan adjustments | $ | 1,390 |  | $ | (398) |  | $ | 992 |  | $ | 1,539 |  | $ | (439) |  | $ | 1,100
Foreign currency translation adjustment |  | 961 |  |  | (253) |  |  | 708 |  |  | (2,034) |  |  | 602 |  |  | (1,432)
Unrealized gain (loss) in fair value of investments |  | 2,053 |  |  | (438) |  |  | 1,615 |  |  | (1,468) |  |  | 325 |  |  | (1,143)
Total other comprehensive income (loss) |  | 4,404 |  |  | (1,089) |  |  | 3,315 |  |  | (1,963) |  |  | 488 |  |  | (1,475)
Less: Other comprehensive income (loss) attributable to noncontrolling interests(a) |  | 160 |  |  | — |  |  | 160 |  |  | — |  |  | — |  |  | —
Total other comprehensive income (loss) attributable to Tutor Perini Corporation | $ | 4,244 |  | $ | (1,089) |  | $ | 3,155 |  | $ | (1,963) |  | $ | 488 |  | $ | (1,475)
____________________________________________________________________________________________________ (a)The only component of other comprehensive income attributable to noncontrolling interests is foreign currency translation.
Schedule of Changes in AOCI Balances by Component (After-Tax) |
| Three Months Ended September 30, 2019
| Defined |  |  |  | Unrealized |  | Accumulated
| Benefit |  | Foreign |  | Gain in |  | Other
| Pension |  | Currency |  | Fair Value of |  | Comprehensive
(in thousands) | Plan |  | Translation |  | Investments, Net |  | Income (Loss)
Attributable to Tutor Perini Corporation: |  |  |  |  |  |  |  |  |  |  |
Balance as of June 30, 2019 | $ | (38,009) |  | $ | (5,416) |  | $ | 895 |  | $ | (42,530)
Other comprehensive income (loss) before reclassifications |  | — |  |  | (351) |  |  | 254 |  |  | (97)
Amounts reclassified from AOCI |  | 331 |  |  | — |  |  | 2 |  |  | 333
Total other comprehensive income |  | 331 |  |  | (351) |  |  | 256 |  |  | 236
Balance as of September 30, 2019 | $ | (37,678) |  | $ | (5,767) |  | $ | 1,151 |  | $ | (42,294)
| Nine Months Ended September 30, 2019
| Defined |  |  |  | Unrealized |  | Accumulated
| Benefit |  | Foreign |  | Gain (Loss) in |  | Other
| Pension |  | Currency |  | Fair Value of |  | Comprehensive
(in thousands) | Plan |  | Translation |  | Investments, Net |  | Income (Loss)
Attributable to Tutor Perini Corporation: |  |  |  |  |  |  |  |  |  |  |
Balance as of December 31, 2018 | $ | (38,670) |  | $ | (6,315) |  | $ | (464) |  | $ | (45,449)
Other comprehensive income before reclassifications |  | — |  |  | 548 |  |  | 1,633 |  |  | 2,181
Amounts reclassified from AOCI |  | 992 |  |  | — |  |  | (18) |  |  | 974
Total other comprehensive income |  | 992 |  |  | 548 |  |  | 1,615 |  |  | 3,155
Balance as of September 30, 2019 | $ | (37,678) |  | $ | (5,767) |  | $ | 1,151 |  | $ | (42,294)
The changes in AOCI balances by component (after tax) attributable to Tutor Perini Corporation during the three and nine months ended September 30, 2018 were as follows:
| Three Months Ended September 30, 2018
| Defined |  |  |  | Unrealized |  | Accumulated
| Benefit |  | Foreign |  | Gain (Loss) in |  | Other
| Pension |  | Currency |  | Fair Value of |  | Comprehensive
(in thousands) | Plan |  | Translation |  | Investments, Net |  | Income (Loss)
Attributable to Tutor Perini Corporation: |  |  |  |  |  |  |  |  |  |  |
Balance as of June 30, 2018 | $ | (38,706) |  | $ | (5,399) |  | $ | (700) |  | $ | (44,805)
Other comprehensive income (loss) before reclassifications |  | — |  |  | 376 |  |  | (145) |  |  | 231
Amounts reclassified from AOCI |  | 365 |  |  | — |  |  | 16 |  |  | 381
Total other comprehensive income (loss) |  | 365 |  |  | 376 |  |  | (129) |  |  | 612
Balance as of September 30, 2018 | $ | (38,341) |  | $ | (5,023) |  | $ | (829) |  | $ | (44,193)
| Nine Months Ended September 30, 2018
| Defined |  |  |  | Unrealized |  | Accumulated
| Benefit |  | Foreign |  | Gain (Loss) in |  | Other
| Pension |  | Currency |  | Value of |  | Comprehensive
(in thousands) | Plan |  | Translation |  | Investments, Net |  | Income (Loss)
Attributable to Tutor Perini Corporation: |  |  |  |  |  |  |  |  |  |  |
Balance as of December 31, 2017 | $ | (39,441) |  | $ | (3,591) |  | $ | 314 |  | $ | (42,718)
Other comprehensive loss before reclassifications |  | — |  |  | (1,432) |  |  | (1,159) |  |  | (2,591)
Amounts reclassified from AOCI |  | 1,100 |  |  | — |  |  | 16 |  |  | 1,116
Total other comprehensive income (loss) |  | 1,100 |  |  | (1,432) |  |  | (1,143) |  |  | (1,475)
Balance as of September 30, 2018 | $ | (38,341) |  | $ | (5,023) |  | $ | (829) |  | $ | (44,193)

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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e526-108580 + Details
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