Changes in Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	$ 1,303,234	$ 1,389,707	$ 1,283,911	$ 1,441,984
Net income (loss)	15,969	(16,764)	43,471	(65,693)
Other comprehensive income (loss)	(257)	232	(1,099)	2,112
Share-based compensation	2,852	1,635	4,355	3,030
Issuance of common stock, net	(681)	141	(2,121)	18
Contributions from noncontrolling interests		0	0	2,000
Distributions to noncontrolling interests	(5,000)	(6,750)	(12,400)	(15,250)
Balance at the end of the period	1,316,117	1,368,201	1,316,117	1,368,201
Common Stock
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	52,284	51,645	52,025	51,521
Issuance of common stock, net	105	325	364	449
Balance at the end of the period	52,389	51,970	52,389	51,970
Additional Paid-in Capital
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	1,146,008	1,142,081	1,146,204	1,140,933
Share-based compensation	2,852	1,635	4,355	3,030
Issuance of common stock, net	(786)	(184)	(2,485)	(431)
Balance at the end of the period	1,148,074	1,143,532	1,148,074	1,143,532
Retained Earnings
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	148,906	255,105	133,146	304,301
Net income (loss)	812	(37,534)	16,572	(86,730)
Balance at the end of the period	149,718	217,571	149,718	217,571
Accumulated Other Comprehensive Loss
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(40,162)	(45,310)	(39,787)	(47,037)
Other comprehensive income (loss)	(64)	(169)	(439)	1,558
Balance at the end of the period	(40,226)	(45,479)	(40,226)	(45,479)
Noncontrolling Interests
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(3,802)	(13,814)	(7,677)	(7,734)
Net income (loss)	15,157	20,770	26,899	21,037
Other comprehensive income (loss)	(193)	401	(660)	554
Contributions from noncontrolling interests				2,000
Distributions to noncontrolling interests	(5,000)	(6,750)	(12,400)	(15,250)
Balance at the end of the period	$ 6,162	$ 607	$ 6,162	$ 607