Other Comprehensive Income (Loss) (Schedule of Components of Other Comprehensive Income (Loss) and Related Tax Effects) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	$ (278)	$ 222	$ (1,224)	$ 2,662
Total other comprehensive income (loss), Tax (Expense) Benefit	21	10	125	(550)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	(257)	232	(1,099)	2,112
Total other comprehensive loss attributable to Tutor Perini Corporation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	(85)	(179)	(564)	2,108
Total other comprehensive income (loss), Tax (Expense) Benefit	21	10	125	(550)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	(64)	(169)	(439)	1,558
Defined benefit pension plan adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	438	411	875	826
Total other comprehensive income (loss), Tax (Expense) Benefit	(117)	(115)	(233)	(229)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	321	296	642	597
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	(869)	562	(1,951)	902
Total other comprehensive income (loss), Tax (Expense) Benefit	166	(34)	321	(124)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	(703)	528	(1,630)	778
Unrealized gain (loss) in fair value of investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	153	(751)	(148)	934
Total other comprehensive income (loss), Tax (Expense) Benefit	(28)	159	37	(197)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	125	(592)	(111)	737
Less: Other comprehensive income (loss) attributable to noncontrolling interests
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	(193)	401	(660)	554
Total other comprehensive income (loss), Tax (Expense) Benefit	0	0	0	0
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	$ (193)	$ 401	$ (660)	$ 554