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Other Comprehensive Income (Loss) (Schedule Of Tax Effects Of The Components Of Other Comprehensive (Loss) Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Other Comprehensive Income (Loss) [Abstract] |  |  |  |
Defined benefit pension plan adjustments, Before-Tax Amount | $ 513 | $ 456 | $ 1,539 | $ 1,368
Defined benefit pension plan adjustments, Tax (Expense) Benefit | (148) | (187) | (439) | (562)
Defined benefit pension plan adjustments, Net-of-Tax Amount | 365 | 269 | 1,100 | 806
Foreign currency translation adjustments, Before-Tax Amount | 519 | 1,232 | (2,034) | 2,242
Foreign currency translation adjustments, Tax (Expense) Benefit | (143) | (506) | 602 | (921)
Foreign currency translation adjustments, Net-of-Tax Amount | 376 | 726 | (1,432) | 1,321
Unrealized (loss) gain in fair value of investments, Before-Tax Amount | (173) | 21 | (1,468) | (20)
Unrealized (loss) gain in fair value of investments, Tax (Expense) Benefit | 44 | (9) | 325 | 8
Unrealized (loss) gain in fair value of investments, Net-of-Tax Amount | (129) | 12 | (1,143) | (12)
Total other comprehensive income (loss), Before-Tax Amount | 859 | 1,709 | (1,963) | 3,590
Total other comprehensive income (loss), Tax (Expense) Benefit | (247) | (702) | 488 | (1,475)
Total other comprehensive income (loss), Net-of-Tax Amount | 612 | 1,007 | (1,475) | 2,115
Total other comprehensive income (loss) attributable to Tutor Perini Corporation, Before-Tax Amount | 859 | 1,709 | (1,963) | 3,590
Total other comprehensive income (loss) attributable to Tutor Perini Corporation, Tax (Expense) Benefit | (247) | (702) | 488 | (1,475)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | $ 612 | $ 1,007 | $ (1,475) | $ 2,115

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