Other Comprehensive Income (Loss) (Schedule Of Changes In AOCI Balances By Component (After-Tax)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period			$ 1,449,718
Balance at the beginning of the period, noncontrolling interests			(7,734)
Other comprehensive income (loss) before reclassifications	$ (508)	$ (2,699)	894	$ (6,276)
Amounts reclassified from AOCI	339	481	664	948
Total other comprehensive income (loss)	(169)	(2,218)	1,558	(5,328)
Other comprehensive income (loss)	401	(773)	554	(1,152)
Balance at the end of the period, noncontrolling interests	607		607
Balance at the end of the period	1,367,594		1,367,594
Defined Benefit Pension Plan
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(32,336)	(37,408)	(32,637)	(37,866)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from AOCI	296	457	597	915
Total other comprehensive income (loss)	296	457	597	915
Balance at the end of the period	(32,040)	(36,951)	(32,040)	(36,951)
Foreign Currency Translation
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(7,010)	(5,796)	(7,241)	(5,787)
Other comprehensive income (loss) before reclassifications	90	(772)	321	(781)
Amounts reclassified from AOCI	0	0	0	0
Total other comprehensive income (loss)	90	(772)	321	(781)
Balance at the end of the period	(6,920)	(6,568)	(6,920)	(6,568)
Unrealized Gain (Loss) in Fair Value of Investments, Net
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(5,964)	(3,541)	(7,159)	18
Other comprehensive income (loss) before reclassifications	(598)	(1,927)	573	(5,495)
Amounts reclassified from AOCI	43	24	67	33
Total other comprehensive income (loss)	(555)	(1,903)	640	(5,462)
Balance at the end of the period	(6,519)	(5,444)	(6,519)	(5,444)
Accumulated Other Comprehensive Income (Loss)
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(45,310)	(46,745)	(47,037)	(43,635)
Balance at the end of the period	(45,479)	(48,963)	(45,479)	(48,963)
AOCI Attributable to Noncontrolling Interest
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period, noncontrolling interests	(1,577)	163	(1,730)	542
Balance at the end of the period, noncontrolling interests	(1,176)	(610)	(1,176)	(610)
Defined Benefit Pension Plan
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period, noncontrolling interests	0	0	0	0
Other comprehensive income (loss)	0	0	0	0
Balance at the end of the period, noncontrolling interests	0	0	0	0
Foreign Currency Translation
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period, noncontrolling interests	(780)	808	(799)	542
Other comprehensive income (loss)	438	(618)	457	(352)
Balance at the end of the period, noncontrolling interests	(342)	190	(342)	190
Unrealized Gain (Loss) in Fair Value of Investments, Net
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period, noncontrolling interests	(797)	(645)	(931)	0
Other comprehensive income (loss)	(37)	(155)	97	(800)
Balance at the end of the period, noncontrolling interests	$ (834)	$ (800)	$ (834)	$ (800)