Other Comprehensive Income (Loss) (Schedule Of Changes In AOCI Balances By Component (After-Tax)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 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	(3,577)	$ (984)
Amounts reclassified from AOCI	467	369
Total other comprehensive income (loss)	(3,110)	(615)
Other comprehensive income (loss) attributable to noncontrolling interests	(379)	296
Balance at the end of the period, noncontrolling interests	14,702
Balance at the end of the period	1,631,819
Defined Benefit Pension Plan
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(37,866)	(44,087)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from AOCI	458	492
Total other comprehensive income (loss)	458	492
Balance at the end of the period	(37,408)	(43,595)
Foreign Currency Translation
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(5,787)	(5,322)
Other comprehensive income (loss) before reclassifications	(9)	76
Amounts reclassified from AOCI	0	0
Total other comprehensive income (loss)	(9)	76
Balance at the end of the period	(5,796)	(5,246)
Unrealized Gain (Loss) in Fair Value of Investments, Net
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	18	2,668
Other comprehensive income (loss) before reclassifications	(3,568)	(1,060)
Amounts reclassified from AOCI	9	(123)
Total other comprehensive income (loss)	(3,559)	(1,183)
Balance at the end of the period	(3,541)	1,485
Accumulated Other Comprehensive Income (Loss)
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(43,635)	(46,741)
Balance at the end of the period	(46,745)	(47,356)
AOCI Attributable to Noncontrolling Interest
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period, noncontrolling interests	542	402
Balance at the end of the period, noncontrolling interests	163	698
Defined Benefit Pension Plan
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period, noncontrolling interests	0	0
Other comprehensive income (loss) attributable to noncontrolling interests	0	0
Balance at the end of the period, noncontrolling interests	0	0
Foreign Currency Translation
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period, noncontrolling interests	542	402
Other comprehensive income (loss) attributable to noncontrolling interests	266	296
Balance at the end of the period, noncontrolling interests	808	698
Unrealized Gain (Loss) in Fair Value of Investments, Net
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period, noncontrolling interests	0	0
Other comprehensive income (loss) attributable to noncontrolling interests	(645)	0
Balance at the end of the period, noncontrolling interests	$ (645)	$ 0