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, 2022	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Defined benefit pension plan adjustments, Before-Tax Amount	$ 639	$ 683
Defined benefit pension plan adjustments, Tax (Expense) Benefit	(181)	(191)
Defined benefit pension plan adjustments, Net-of-Tax Amount	458	492
Foreign currency translation adjustment, Before-Tax Amount	256	402
Foreign currency translation adjustment, Tax (Expense) Benefit	1	(30)
Foreign currency translation adjustment, Net-of-Tax Amount	257	372
Unrealized gain (loss) in fair value of investments, Before-Tax Amount	(5,514)	(1,550)
Unrealized gain (loss) in fair value of investments, Tax (Expense) Benefit	1,310	367
Unrealized gain (loss) in fair value of investments, Net-of-Tax Amount	(4,204)	(1,183)
Total other comprehensive income (loss), Before-Tax Amount	(4,619)	(465)
Total other comprehensive income (loss), Tax Benefit (Expense)	1,130	146
TOTAL OTHER COMPREHENSIVE LOSS, NET OF TAX	(3,489)	(319)
Less: Other comprehensive income (loss) attributable to noncontrolling interests, Before-Tax Amount	(379)	296
Less: Other comprehensive income (loss) attributable to noncontrolling interests, Tax (Expense) Benefit	0	0
Less: Other comprehensive income (loss) attributable to noncontrolling interests, Net-of-Tax Amount	(379)	296
Total other comprehensive income (loss) attributable to Tutor Perini Corporation, Before-Tax Amount	(4,240)	(761)
Total other comprehensive income (loss) attributable to Tutor Perini Corporation, Tax (Expense) Benefit	1,130	146
Total other comprehensive income (loss)	$ (3,110)	$ (615)