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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total other comprehensive income (loss), Before-Tax Amount | $ (278) | $ 222 | $ (1,224) | $ 2,662
Total other comprehensive income (loss), Tax (Expense) Benefit | 21 | 10 | 125 | (550)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | (257) | 232 | (1,099) | 2,112
Total other comprehensive loss attributable to Tutor Perini Corporation |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total other comprehensive income (loss), Before-Tax Amount | (85) | (179) | (564) | 2,108
Total other comprehensive income (loss), Tax (Expense) Benefit | 21 | 10 | 125 | (550)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | (64) | (169) | (439) | 1,558
Defined benefit pension plan adjustments |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total other comprehensive income (loss), Before-Tax Amount | 438 | 411 | 875 | 826
Total other comprehensive income (loss), Tax (Expense) Benefit | (117) | (115) | (233) | (229)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | 321 | 296 | 642 | 597
Foreign currency translation adjustments |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total other comprehensive income (loss), Before-Tax Amount | (869) | 562 | (1,951) | 902
Total other comprehensive income (loss), Tax (Expense) Benefit | 166 | (34) | 321 | (124)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | (703) | 528 | (1,630) | 778
Unrealized gain (loss) in fair value of investments |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total other comprehensive income (loss), Before-Tax Amount | 153 | (751) | (148) | 934
Total other comprehensive income (loss), Tax (Expense) Benefit | (28) | 159 | 37 | (197)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | 125 | (592) | (111) | 737
Less: Other comprehensive income (loss) attributable to noncontrolling interests |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total other comprehensive income (loss), Before-Tax Amount | (193) | 401 | (660) | 554
Total other comprehensive income (loss), Tax (Expense) Benefit | 0 | 0 | 0 | 0
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | $ (193) | $ 401 | $ (660) | $ 554

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