Other Comprehensive Income (Loss) (Schedule Of Changes In AOCI Balances By Component (After-Tax)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 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	1,402	$ (3,577)
Amounts reclassified from AOCI	325	467
Total other comprehensive income (loss)	1,727	(3,110)
Other comprehensive income (loss)	153	(379)
Balance at the end of the period, noncontrolling interests	(13,814)
Balance at the end of the period	1,403,521
Defined Benefit Pension Plan
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(32,637)	(37,866)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from AOCI	301	458
Total other comprehensive income (loss)	301	458
Balance at the end of the period	(32,336)	(37,408)
Foreign Currency Translation
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(7,241)	(5,787)
Other comprehensive income (loss) before reclassifications	231	(9)
Amounts reclassified from AOCI	0	0
Total other comprehensive income (loss)	231	(9)
Balance at the end of the period	(7,010)	(5,796)
Unrealized Gain (Loss) in Fair Value of Investments, Net
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(7,159)	18
Other comprehensive income (loss) before reclassifications	1,171	(3,568)
Amounts reclassified from AOCI	24	9
Total other comprehensive income (loss)	1,195	(3,559)
Balance at the end of the period	(5,964)	(3,541)
Accumulated Other Comprehensive Income (Loss)
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period	(47,037)	(43,635)
Balance at the end of the period	(45,310)	(46,745)
AOCI Attributable to Noncontrolling Interest
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period, noncontrolling interests	(1,730)	542
Balance at the end of the period, noncontrolling interests	(1,577)	163
Defined Benefit Pension Plan
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period, noncontrolling interests	0	0
Other comprehensive income (loss)	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	(799)	542
Other comprehensive income (loss)	19	266
Balance at the end of the period, noncontrolling interests	(780)	808
Unrealized Gain (Loss) in Fair Value of Investments, Net
Attributable to Tutor Perini Corporation:
Balance at the beginning of the period, noncontrolling interests	(931)	0
Other comprehensive income (loss)	134	(645)
Balance at the end of the period, noncontrolling interests	$ (797)	$ (645)