CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
REVENUE	$ 1,276,427,000	$ 1,125,275,000	$ 2,527,156,000	$ 2,083,762,000
COST OF OPERATIONS	(1,158,673,000)	(1,024,332,000)	(2,298,322,000)	(1,894,349,000)
GROSS PROFIT	117,754,000	100,943,000	228,834,000	189,413,000
General and administrative expenses	(60,058,000)	(62,797,000)	(123,911,000)	(128,354,000)
Goodwill impairment	0	(379,863,000)		(379,863,000)
INCOME (LOSS) FROM CONSTRUCTION OPERATIONS	57,696,000	(341,717,000)	104,923,000	(318,804,000)
Other income (expense)	(797,000)	900,000	(316,000)	1,322,000
Interest expense	(16,464,000)	(17,522,000)	(32,900,000)	(33,947,000)
INCOME (LOSS) BEFORE INCOME TAXES	40,435,000	(358,339,000)	71,707,000	(351,429,000)
Income tax (expense) benefit	(9,576,000)	42,900,000	(14,710,000)	40,712,000
NET INCOME (LOSS)	30,859,000	(315,439,000)	56,997,000	(310,717,000)
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	12,150,000	5,091,000	20,917,000	10,169,000
NET INCOME (LOSS) ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$ 18,709,000	$ (320,530,000)	$ 36,080,000	$ (320,886,000)
BASIC EARNINGS (LOSS) PER COMMON SHARE	$ 0.37	$ (6.38)	$ 0.71	$ (6.40)
DILUTED EARNINGS (LOSS) PER COMMON SHARE	$ 0.37	$ (6.38)	$ 0.71	$ (6.40)
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING:
BASIC	50,667	50,224	50,502	50,161
DILUTED	50,935	50,224	50,885	50,161