CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) [Abstract]
NET INCOME (LOSS)	$ 26,721	$ 25,436	$ (283,996)	$ 42,390
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Defined benefit pension plan adjustments	331	365	992	1,100
Foreign currency translation adjustments	(450)	376	708	(1,432)
Unrealized gain (loss) in fair value of investments	256	(129)	1,615	(1,143)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	137	612	3,315	(1,475)
COMPREHENSIVE INCOME (LOSS)	26,858	26,048	(280,681)	40,915
LESS: COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	7,309	4,164	17,737	8,359
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$ 19,549	$ 21,884	$ (298,418)	$ 32,556

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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