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Other Comprehensive Income (Loss) (Schedule Of Tax Effects Of The Components Of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Other Comprehensive Income (Loss) [Abstract] |  |  |  |
Defined benefit pension plan adjustments, Before-Tax Amount | $ 456 | $ 427 | $ 912 | $ 853
Defined benefit pension plan adjustments, Tax (Expense) Benefit | (187) | (103) | (375) | (282)
Defined benefit pension plan adjustments, Net-of-Tax Amount | 269 | 324 | 537 | 571
Foreign currency translation adjustments, Before-Tax Amount | 1,101 | (396) | 1,009 | 1,208
Foreign currency translation adjustments, Tax (Expense) Benefit | (452) | 138 | (414) | (536)
Foreign currency translation adjustments, Net-of-Tax Amount | 649 | (258) | 595 | 672
Unrealized (loss) gain in fair value of investments, Before-Tax Amount | (6) | (271) | (42) | (258)
Unrealized (loss) gain in fair value of investments, Tax (Expense) Benefit | 3 | 118 | 18 | 113
Unrealized (loss) gain in fair value of investments, Net-of-Tax Amount | (3) | (153) | (24) | (145)
Unrealized loss in fair value of interest rate swap, Before-Tax Amount |  | 17 |  | (45)
Unrealized loss in fair value of interest rate swap, Tax (Expense) Benefit |  | (6) |  | 21
Unrealized loss in fair value of interest rate swap, Net-of-Tax Amount |  | 11 |  | (24)
Total other comprehensive income (loss), Before-Tax Amount | 1,551 | (223) | 1,879 | 1,758
Total other comprehensive income (loss), Tax (Expense) Benefit | (636) | 147 | (771) | (684)
Total other comprehensive income (loss), Net-of-Tax Amount | 915 | (76) | 1,108 | 1,074
Other comprehensive income (loss) attributable to Tutor Perini Corporation, Before-Tax Amount | 1,551 | (223) | 1,879 | 1,758
Other comprehensive income (loss) attributable to Tutor Perini Corporation, Tax (Expense) Benefit | (636) | 147 | (771) | (684)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | $ 915 | $ (76) | $ 1,108 | $ 1,074

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