Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income (loss) attributable to Tutor Perini Corporation	$ (21,634)	$ 16,034
Weighted-average common shares outstanding, basic (in shares)	51,107	50,913
Effect of dilutive restricted stock units and stock options (in shares)	0	435
Weighted-average common shares outstanding, diluted (in shares)	51,107	51,348
Net income attributable to Tutor Perini Corporation per common share: Basic (in dollars per share)	$ (0.42)	$ 0.31
Net income attributable to Tutor Perini Corporation per common share: Diluted (in dollars per share)	$ (0.42)	$ 0.31
Anti-dilutive securities not included above (in shares)	3,431	1,640