CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
NET INCOME (LOSS)	$ 30,859	$ (315,439)	$ 56,997	$ (310,717)
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Defined benefit pension plan adjustments	424	331	847	661
Foreign currency translation adjustments	1,655	810	(2,358)	1,158
Unrealized gain in fair value of investments	1,306	686	1,848	1,359
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	3,385	1,827	337	3,178
COMPREHENSIVE INCOME (LOSS)	34,244	(313,612)	57,334	(307,539)
LESS: COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	13,004	5,248	19,751	10,428
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$ 21,240	$ (318,860)	$ 37,583	$ (317,967)

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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