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, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period			$ 1,654,921
Balance at the beginning of the period, noncontrolling interests			18,799
Other comprehensive income (loss) before reclassifications	$ (2,699)	$ 353	(6,276)	$ (631)
Amounts reclassified from AOCI	481	477	948	846
Total other comprehensive income (loss)	(2,218)	830	(5,328)	215
Other comprehensive income (loss) attributable to noncontrolling interests	(773)	280	(1,152)	576
Balance at the end of the period, noncontrolling interests	(2,088)		(2,088)
Balance at the end of the period	1,570,034		1,570,034
Defined Benefit Pension Plan
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(37,408)	(43,595)	(37,866)	(44,087)
Other comprehensive income (loss) before reclassifications	0	0	0	0
Amounts reclassified from AOCI	457	491	915	983
Total other comprehensive income (loss)	457	491	915	983
Balance at the end of the period	(36,951)	(43,104)	(36,951)	(43,104)
Foreign Currency Translation
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(5,796)	(5,246)	(5,787)	(5,322)
Other comprehensive income (loss) before reclassifications	(772)	120	(781)	196
Amounts reclassified from AOCI	0	0	0	0
Total other comprehensive income (loss)	(772)	120	(781)	196
Balance at the end of the period	(6,568)	(5,126)	(6,568)	(5,126)
Unrealized Gain (Loss) in Fair Value of Investments, Net
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(3,541)	1,485	18	2,668
Other comprehensive income (loss) before reclassifications	(1,927)	233	(5,495)	(827)
Amounts reclassified from AOCI	24	(14)	33	(137)
Total other comprehensive income (loss)	(1,903)	219	(5,462)	(964)
Balance at the end of the period	(5,444)	1,704	(5,444)	1,704
Accumulated Other Comprehensive Income (Loss)
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(46,745)	(47,356)	(43,635)	(46,741)
Balance at the end of the period	(48,963)	(46,526)	(48,963)	(46,526)
AOCI Attributable to Noncontrolling Interest
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period, noncontrolling interests	163	698	542	402
Balance at the end of the period, noncontrolling interests	(610)	978	(610)	978
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) attributable to noncontrolling interests	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	808	698	542	402
Other comprehensive income (loss) attributable to noncontrolling interests	(618)	280	(352)	576
Balance at the end of the period, noncontrolling interests	190	978	190	978
Unrealized Gain (Loss) in Fair Value of Investments, Net
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period, noncontrolling interests	(645)	0	0	0
Other comprehensive income (loss) attributable to noncontrolling interests	(155)	0	(800)	0
Balance at the end of the period, noncontrolling interests	$ (800)	$ 0	$ (800)	$ 0