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Other Comprehensive Income (Loss) (Schedule Of Components Of Other Comprehensive Income (Loss) And Related Tax Effects) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total other comprehensive income (loss), Before-Tax Amount | $ (1,120) | $ (5,565) | $ 1,542 | $ (13,628)
Total other comprehensive income (loss), Tax (Expense) Benefit | 147 | 986 | (403) | 2,569
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | (973) | (4,579) | 1,139 | (11,059)
Defined benefit pension plan adjustments |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total other comprehensive income (loss), Before-Tax Amount | 413 | 639 | 1,239 | 1,916
Total other comprehensive income (loss), Tax (Expense) Benefit | (114) | (181) | (343) | (543)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | 299 | 458 | 896 | 1,373
Foreign currency translation adjustments |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total other comprehensive income (loss), Before-Tax Amount | (1,204) | (3,016) | (302) | (4,458)
Total other comprehensive income (loss), Tax (Expense) Benefit | 187 | 489 | 63 | 798
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | (1,017) | (2,527) | (239) | (3,660)
Unrealized gain (loss) in fair value of investments |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total other comprehensive income (loss), Before-Tax Amount | (329) | (3,188) | 605 | (11,086)
Total other comprehensive income (loss), Tax (Expense) Benefit | 74 | 678 | (123) | 2,314
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | (255) | (2,510) | 482 | (8,772)
Less: Other comprehensive loss attributable to noncontrolling interests |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total other comprehensive income (loss), Before-Tax Amount | (473) | (1,525) | 81 | (2,677)
Total other comprehensive income (loss), Tax (Expense) Benefit | 0 | 0 | 0 | 0
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | (473) | (1,525) | 81 | (2,677)
Total other comprehensive income (loss) attributable to Tutor Perini Corporation |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total other comprehensive income (loss), Before-Tax Amount | (647) | (4,040) | 1,461 | (10,951)
Total other comprehensive income (loss), Tax (Expense) Benefit | 147 | 986 | (403) | 2,569
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | $ (500) | $ (3,054) | $ 1,058 | $ (8,382)

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