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Other Comprehensive Income (Loss) (Schedule Of Changes In AOCI Balances By Component (After-Tax)) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Attributable to Tutor Perini Corporation: |  |  |  |
Balance at the beginning of the period |  |  | $ 1,553,856 |
Other comprehensive income (loss) before reclassifications | $ (1,069) | $ 579 | (1,700) | $ 1,268
Amounts reclassified from AOCI | 435 | 202 | 1,281 | 1,016
Total other comprehensive income (loss) | (634) | 781 | (419) | 2,284
Balance at the end of the period | 1,621,286 |  | 1,621,286 |
Defined Benefit Pension Plan |  |  |  |
Attributable to Tutor Perini Corporation: |  |  |  |
Balance at the beginning of the period | (43,104) | (36,979) | (44,087) | (37,826)
Other comprehensive income (loss) before reclassifications | 0 | 0 | 0 | 0
Amounts reclassified from AOCI | 492 | 424 | 1,475 | 1,271
Total other comprehensive income (loss) | 492 | 424 | 1,475 | 1,271
Balance at the end of the period | (42,612) | (36,555) | (42,612) | (36,555)
Foreign Currency Translation |  |  |  |
Attributable to Tutor Perini Corporation: |  |  |  |
Balance at the beginning of the period | (5,126) | (6,563) | (5,322) | (5,371)
Other comprehensive income (loss) before reclassifications | (678) | 582 | (482) | (610)
Amounts reclassified from AOCI | 0 | 0 | 0 | 0
Total other comprehensive income (loss) | (678) | 582 | (482) | (610)
Balance at the end of the period | (5,804) | (5,981) | (5,804) | (5,981)
Unrealized Gain (Loss) in Fair Value of Investments, Net |  |  |  |
Attributable to Tutor Perini Corporation: |  |  |  |
Balance at the beginning of the period | 1,704 | 2,945 | 2,668 | 1,097
Other comprehensive income (loss) before reclassifications | (391) | (3) | (1,218) | 1,878
Amounts reclassified from AOCI | (57) | (222) | (194) | (255)
Total other comprehensive income (loss) | (448) | (225) | (1,412) | 1,623
Balance at the end of the period | 1,256 | 2,720 | 1,256 | 2,720
Accumulated Other Comprehensive Income (Loss) |  |  |  |
Attributable to Tutor Perini Corporation: |  |  |  |
Balance at the beginning of the period | (46,526) | (40,597) | (46,741) | (42,100)
Balance at the end of the period | $ (47,160) | $ (39,816) | $ (47,160) | $ (39,816)

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