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, 2023	Mar. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	$ 2,440	$ (4,619)
Total other comprehensive income (loss), Tax (Expense) Benefit	(560)	1,130
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	1,880	(3,489)
Defined benefit pension plan adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	415	639
Total other comprehensive income (loss), Tax (Expense) Benefit	(114)	(181)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	301	458
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	340	256
Total other comprehensive income (loss), Tax (Expense) Benefit	(90)	1
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	250	257
Unrealized gain (loss) in fair value of investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	1,685	(5,514)
Total other comprehensive income (loss), Tax (Expense) Benefit	(356)	1,310
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	1,329	(4,204)
Less: Other comprehensive income (loss) attributable to noncontrolling interests
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Before-Tax Amount	153	(379)
Total other comprehensive income (loss), Tax (Expense) Benefit	0	0
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	153	(379)
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	2,287	(4,240)
Total other comprehensive income (loss), Tax (Expense) Benefit	(560)	1,130
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	$ 1,727	$ (3,110)