CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) [Abstract]
NET INCOME (LOSS)	$ (315,439)	$ 27,896	$ (310,717)	$ 16,954
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Defined benefit pension plan adjustments	331	354	661	735
Foreign currency translation adjustments	810	(634)	1,158	(1,808)
Unrealized gain (loss) in fair value of investments	686	(929)	1,359	(1,014)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	1,827	(1,209)	3,178	(2,087)
COMPREHENSIVE INCOME (LOSS)	(313,612)	26,687	(307,539)	14,867
LESS: COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	5,248	3,013	10,428	4,195
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$ (318,860)	$ 23,674	$ (317,967)	$ 10,672

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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