Other Comprehensive Income (Loss) (AOCI Reclassifications) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income, net	$ (3,697)	$ (175)
Income tax expense (benefit)	(3,889)	6,964
Net income (loss) attributable to Tutor Perini Corporation	21,634	(16,034)
Defined Benefit Pension Plan | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income, net	639	683
Income tax expense (benefit)	(181)	(191)
Net income (loss) attributable to Tutor Perini Corporation	458	492
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	11	(156)
Income tax expense (benefit)	(2)	33
Net income (loss) attributable to Tutor Perini Corporation	$ 9	$ (123)