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Summary of Significant Accounting Policies (Schedule of Reclassification from AOCI) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other income, net $ 19,878 $ 17,200 $ 6,732
Income tax benefit 50,669 54,957 75,098
NET LOSS ATTRIBUTABLE TO TUTOR PERINI CORPORATION (163,721) (171,155) (210,009)
Reclassification out of Accumulated Other Comprehensive Income | Defined Benefit Pension Plan      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other income, net 1,664 1,700 2,570
Income tax benefit (448) (453) (711)
NET LOSS ATTRIBUTABLE TO TUTOR PERINI CORPORATION 1,216 1,247 1,859
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Loss in Fair Value of Investment Adjustments      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Other income, net 128 115 121
Income tax benefit (27) (24) (25)
NET LOSS ATTRIBUTABLE TO TUTOR PERINI CORPORATION $ 101 $ 91 $ 96