CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
REVENUE	$ 5,543,039	$ 4,326,922	$ 3,880,227
COST OF OPERATIONS	(4,895,524)	(4,129,884)	(3,739,603)
GROSS PROFIT	647,515	197,038	140,624
General and administrative expenses	(415,554)	(300,791)	(255,221)
INCOME (LOSS) FROM CONSTRUCTION OPERATIONS	231,961	(103,753)	(114,597)
Other income, net	27,512	19,878	17,200
Interest expense	(54,965)	(89,133)	(85,157)
INCOME (LOSS) BEFORE INCOME TAXES	204,508	(173,008)	(182,554)
Income tax (expense) benefit	(61,427)	50,669	54,957
NET INCOME (LOSS)	143,081	(122,339)	(127,597)
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	62,641	41,382	43,558
NET INCOME (LOSS) ATTRIBUTABLE TO TUTOR PERINI CORPORATION	$ 80,440	$ (163,721)	$ (171,155)
BASIC EARNINGS (LOSS) PER COMMON SHARE (in dollars per share)	$ 1.53	$ (3.13)	$ (3.30)
DILUTED EARNINGS (LOSS) PER COMMON SHARE (in dollars per share)	$ 1.51	$ (3.13)	$ (3.30)
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING:
BASIC (in shares)	52,693	52,322	51,845
DILUTED (in shares)	53,413	52,322	51,845