Changes in Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	$ 1,646,521	$ 1,572,081	$ 1,673,720	$ 1,542,945
Net income (loss)	(62,020)	41,611	(80,833)	66,716
Other comprehensive income (loss)	(2,991)	1,110	(6,480)	791
Share-based compensation	3,278	3,171	5,002	4,757
Issuance of common stock, net	158	(293)	76	(1,529)
Contributions from noncontrolling interests			961	4,000
Distributions to noncontrolling interests	(17,000)	(7,250)	(24,500)	(7,250)
Balance at the end of the period	1,567,946	1,610,430	1,567,946	1,610,430
Common Stock
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	51,200	50,938	51,096	50,827
Issuance of common stock, net	158	134	262	245
Balance at the end of the period	51,358	51,072	51,358	51,072
Additional Paid-in Capital
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	1,134,688	1,127,624	1,133,150	1,127,385
Share-based compensation	3,278	3,171	5,002	4,757
Issuance of common stock, net		(427)	(186)	(1,774)
Balance at the end of the period	1,137,966	1,130,368	1,137,966	1,130,368
Retained Earnings
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	492,676	438,419	514,310	422,385
Net income (loss)	(63,003)	31,165	(84,637)	47,199
Balance at the end of the period	429,673	469,584	429,673	469,584
Accumulated Other Comprehensive Loss
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(46,745)	(47,356)	(43,635)	(46,741)
Other comprehensive income (loss)	(2,218)	830	(5,328)	215
Balance at the end of the period	(48,963)	(46,526)	(48,963)	(46,526)
Noncontrolling Interests
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	14,702	2,456	18,799	(10,911)
Net income (loss)	983	10,446	3,804	19,517
Other comprehensive income (loss)	(773)	280	(1,152)	576
Contributions from noncontrolling interests			961	4,000
Distributions to noncontrolling interests	(17,000)	(7,250)	(24,500)	(7,250)
Balance at the end of the period	$ (2,088)	$ 5,932	$ (2,088)	$ 5,932