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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
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Total other comprehensive income (loss), Before-Tax Amount | $ 2,844 | $ (946)
Total other comprehensive income (loss), Tax (Expense) Benefit | (568) | 104
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | 2,276 | (842)
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 | 2,366 | (479)
Total other comprehensive income (loss), Tax (Expense) Benefit | (568) | 104
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | 1,798 | (375)
Defined benefit pension plan adjustments |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Total other comprehensive income (loss), Before-Tax Amount | 413 | 437
Total other comprehensive income (loss), Tax (Expense) Benefit | (111) | (116)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | 302 | 321
Foreign currency translation adjustments |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Total other comprehensive income (loss), Before-Tax Amount | 787 | (1,082)
Total other comprehensive income (loss), Tax (Expense) Benefit | (118) | 155
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | 669 | (927)
Unrealized gain (loss) in fair value of investments |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Total other comprehensive income (loss), Before-Tax Amount | 1,644 | (301)
Total other comprehensive income (loss), Tax (Expense) Benefit | (339) | 65
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | 1,305 | (236)
Less: Other comprehensive income (loss) attributable to noncontrolling interests |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Total other comprehensive income (loss), Before-Tax Amount | 478 | (467)
Total other comprehensive income (loss), Tax (Expense) Benefit | 0 | 0
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX | $ 478 | $ (467)

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