Other Comprehensive Income (Loss) (Schedule of Components of Other Comprehensive Income (Loss) and Related Tax Effects) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	$ (946)	$ 2,440
Total other comprehensive income (loss), Tax (Expense) Benefit	104	(560)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	(842)	1,880
Total other comprehensive income (loss) attributable to Tutor Perini Corporation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	(479)	2,287
Total other comprehensive income (loss), Tax (Expense) Benefit	104	(560)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	(375)	1,727
Defined benefit pension plan adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	437	415
Total other comprehensive income (loss), Tax (Expense) Benefit	(116)	(114)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	321	301
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	(1,082)	340
Total other comprehensive income (loss), Tax (Expense) Benefit	155	(90)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	(927)	250
Unrealized gain (loss) in fair value of investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	(301)	1,685
Total other comprehensive income (loss), Tax (Expense) Benefit	65	(356)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	(236)	1,329
Less: Other comprehensive income (loss) attributable to noncontrolling interests
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	(467)	153
Total other comprehensive income (loss), Tax (Expense) Benefit	0	0
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	$ (467)	$ 153