Changes in Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	$ 1,567,946	$ 1,610,430	$ 1,673,720	$ 1,542,945
Net income (loss)	(24,070)	26,241	(104,903)	92,957
Other comprehensive income (loss)	(4,579)	(1,081)	(11,059)	(290)
Share-based compensation	1,816	2,030	6,818	6,787
Issuance of common stock, net	250	(2)	326	(1,531)
Contributions from noncontrolling interests		3,000	961	7,000
Distributions to noncontrolling interests	(22,000)	(10,000)	(46,500)	(17,250)
Balance at the end of the period	1,519,363	1,630,618	1,519,363	1,630,618
Common Stock
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	51,358	51,072	51,096	50,827
Issuance of common stock, net	127		389	245
Balance at the end of the period	51,485	51,072	51,485	51,072
Additional Paid-in Capital
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	1,137,966	1,130,368	1,133,150	1,127,385
Share-based compensation	1,816	2,030	6,818	6,787
Issuance of common stock, net	123	(2)	(63)	(1,776)
Balance at the end of the period	1,139,905	1,132,396	1,139,905	1,132,396
Retained Earnings
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	429,673	469,584	514,310	422,385
Net income (loss)	(32,455)	15,394	(117,092)	62,593
Balance at the end of the period	397,218	484,978	397,218	484,978
Accumulated Other Comprehensive Loss
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(48,963)	(46,526)	(43,635)	(46,741)
Other comprehensive income (loss)	(3,054)	(634)	(8,382)	(419)
Balance at the end of the period	(52,017)	(47,160)	(52,017)	(47,160)
Noncontrolling Interests
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(2,088)	5,932	18,799	(10,911)
Net income (loss)	8,385	10,847	12,189	30,364
Other comprehensive income (loss)	(1,525)	(447)	(2,677)	129
Contributions from noncontrolling interests		3,000	961	7,000
Distributions to noncontrolling interests	(22,000)	(10,000)	(46,500)	(17,250)
Balance at the end of the period	$ (17,228)	$ 9,332	$ (17,228)	$ 9,332