Other Comprehensive Income (Loss) (AOCI Reclassifications) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income, net	$ (1,020)	$ (1,431)	$ (4,717)	$ (1,606)
Income tax expense (benefit)	(43,718)	10,635	(47,607)	17,599
Net income (loss) attributable to Tutor Perini Corporation	63,003	(31,165)	84,637	(47,199)
Defined Benefit Pension Plan | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income, net	638	683	1,277	1,366
Income tax expense (benefit)	(181)	(192)	(362)	(383)
Net income (loss) attributable to Tutor Perini Corporation	457	491	915	983
Unrealized (gain) loss in fair value of investment adjustments | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income, net	31	(17)	42	(173)
Income tax expense (benefit)	(7)	3	(9)	36
Net income (loss) attributable to Tutor Perini Corporation	$ 24	$ (14)	$ 33	$ (137)