Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net income (loss) attributable to Tutor Perini Corporation	$ (63,003)	$ 31,165	$ (84,637)	$ 47,199
Weighted-average common shares outstanding, basic (in shares)	51,276	50,999	51,192	50,956
Effect of dilutive restricted stock units and stock options (in shares)	0	376	0	406
Weighted-average common shares outstanding, diluted (in shares)	51,276	51,375	51,192	51,362
Net income (loss) attributable to Tutor Perini Corporation per common share: Basic (in dollars per share)	$ (1.23)	$ 0.61	$ (1.65)	$ 0.93
Net income (loss) attributable to Tutor Perini Corporation per common share: Diluted (in dollars per share)	$ (1.23)	$ 0.61	$ (1.65)	$ 0.92
Anti-dilutive securities not included above (in shares)	3,398	1,810	3,415	1,725