Other Comprehensive Income (Loss) (AOCI Reclassifications) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income (expense)	$ (397)	$ 464	$ (5,114)	$ (1,142)
Income tax expense (benefit)	560	8,694	(47,047)	26,293
Net income (loss) attributable to Tutor Perini Corporation	32,455	(15,394)	117,092	(62,593)
Defined Benefit Pension Plan | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income (expense)	639	683	1,916	2,049
Income tax expense (benefit)	(181)	(191)	(543)	(574)
Net income (loss) attributable to Tutor Perini Corporation	458	492	1,373	1,475
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 (expense)	79	(73)	121	(246)
Income tax expense (benefit)	(16)	16	(25)	52
Net income (loss) attributable to Tutor Perini Corporation	$ 63	$ (57)	$ 96	$ (194)