CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
NET LOSS	$ (25,826)	$ (24,070)	$ (91,519)	$ (104,903)
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Defined benefit pension plan adjustments	299	458	896	1,373
Foreign currency translation adjustments	(1,017)	(2,527)	(239)	(3,660)
Unrealized gain (loss) in fair value of investments	(255)	(2,510)	482	(8,772)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	(973)	(4,579)	1,139	(11,059)
COMPREHENSIVE LOSS	(26,799)	(28,649)	(90,380)	(115,962)
LESS: COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	10,597	6,860	32,188	9,512
COMPREHENSIVE LOSS ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$ (37,396)	$ (35,509)	$ (122,568)	$ (125,474)