Changes in Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	$ 1,368,201	$ 1,567,946	$ 1,441,984	$ 1,673,720
Net income (loss)	(25,826)	(24,070)	(91,519)	(104,903)
Other comprehensive loss	(973)	(4,579)	1,139	(11,059)
Share-based compensation	1,756	1,816	4,786	6,818
Issuance of common stock, net	(453)	250	(435)	326
Contributions from noncontrolling interests	2,500		4,500	961
Distributions to noncontrolling interests	(11,250)	(22,000)	(26,500)	(46,500)
Balance at the end of the period	1,333,955	1,519,363	1,333,955	1,519,363
Common Stock
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	51,970	51,358	51,521	51,096
Issuance of common stock, net	52	127	501	389
Balance at the end of the period	52,022	51,485	52,022	51,485
Additional Paid-in Capital
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	1,143,532	1,137,966	1,140,933	1,133,150
Share-based compensation	1,756	1,816	4,786	6,818
Issuance of common stock, net	(505)	123	(936)	(63)
Balance at the end of the period	1,144,783	1,139,905	1,144,783	1,139,905
Retained Earnings
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	217,571	429,673	304,301	514,310
Net income (loss)	(36,896)	(32,455)	(123,626)	(117,092)
Balance at the end of the period	180,675	397,218	180,675	397,218
Accumulated Other Comprehensive Loss
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(45,479)	(48,963)	(47,037)	(43,635)
Other comprehensive loss	(500)	(3,054)	1,058	(8,382)
Balance at the end of the period	(45,979)	(52,017)	(45,979)	(52,017)
Noncontrolling Interests
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	607	(2,088)	(7,734)	18,799
Net income (loss)	11,070	8,385	32,107	12,189
Other comprehensive loss	(473)	(1,525)	81	(2,677)
Contributions from noncontrolling interests	2,500		4,500	961
Distributions to noncontrolling interests	(11,250)	(22,000)	(26,500)	(46,500)
Balance at the end of the period	$ 2,454	$ (17,228)	$ 2,454	$ (17,228)