Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net loss attributable to Tutor Perini Corporation	$ (37,534)	$ (63,003)	$ (86,730)	$ (84,637)
Weighted-average common shares outstanding, basic (in shares)	51,803	51,276	51,678	51,192
Effect of dilutive RSUs and stock options (in shares)	0	0	0	0
Weighted-average common shares outstanding, diluted (in shares)	51,803	51,276	51,678	51,192
Net loss attributable to Tutor Perini Corporation per common share: Basic (in dollars per share)	$ (0.72)	$ (1.23)	$ (1.68)	$ (1.65)
Net loss attributable to Tutor Perini Corporation per common share: Diluted (in dollars per share)	$ (0.72)	$ (1.23)	$ (1.68)	$ (1.65)
Anti-dilutive securities not included above (in shares)	3,163	3,398	3,010	3,415