Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net loss attributable to Tutor Perini Corporation	$ (36,896)	$ (32,455)	$ (123,626)	$ (117,092)
Weighted-average common shares outstanding, basic (in shares)	51,994	51,404	51,784	51,263
Effect of dilutive RSUs and stock options (in shares)	0	0	0	0
Weighted-average common shares outstanding, diluted (in shares)	51,994	51,404	51,784	51,263
Net loss attributable to Tutor Perini Corporation per common share: Basic (in dollars per share)	$ (0.71)	$ (0.63)	$ (2.39)	$ (2.28)
Net loss attributable to Tutor Perini Corporation per common share: Diluted (in dollars per share)	$ (0.71)	$ (0.63)	$ (2.39)	$ (2.28)
Anti-dilutive securities not included above (in shares)	3,077	3,011	3,032	3,280