Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net income (loss) attributable to Tutor Perini Corporation	$ (32,455)	$ 15,394	$ (117,092)	$ 62,593
Weighted-average common shares outstanding, basic (in shares)	51,404	51,072	51,263	50,995
Effect of dilutive restricted stock units and stock options (in shares)	0	294	0	369
Weighted-average common shares outstanding, diluted (in shares)	51,404	51,366	51,263	51,364
Net income (loss) attributable to Tutor Perini Corporation per common share: Basic (in dollars per share)	$ (0.63)	$ 0.30	$ (2.28)	$ 1.23
Net income (loss) attributable to Tutor Perini Corporation per common share: Diluted (in dollars per share)	$ (0.63)	$ 0.30	$ (2.28)	$ 1.22
Anti-dilutive securities not included above (in shares)	3,011	2,131	3,280	1,861