v3.26.1
Other Comprehensive Income (Loss) (Schedule of Components of Other Comprehensive Income (Loss) and Related Tax Effects) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Total other comprehensive income (loss), Before-Tax Amount $ (2,713) $ 2,844
Total other comprehensive income (loss), Tax Expense 482 (568)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX (2,231) 2,276
Total other comprehensive income (loss) attributable to Tutor Perini Corporation    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Total other comprehensive income (loss), Before-Tax Amount (2,271) 2,366
Total other comprehensive income (loss), Tax Expense 482 (568)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX (1,789) 1,798
Defined benefit pension plan adjustments    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Total other comprehensive income (loss), Before-Tax Amount 431 413
Total other comprehensive income (loss), Tax Expense (118) (111)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX 313 302
Foreign currency translation adjustments    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Total other comprehensive income (loss), Before-Tax Amount (577) 787
Total other comprehensive income (loss), Tax Expense 81 (118)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX (496) 669
Unrealized gain (loss) in fair value of investments    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Total other comprehensive income (loss), Before-Tax Amount (2,567) 1,644
Total other comprehensive income (loss), Tax Expense 519 (339)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX (2,048) 1,305
Less: Other comprehensive income (loss) attributable to noncontrolling interests    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Total other comprehensive income (loss), Before-Tax Amount (442) 478
Total other comprehensive income (loss), Tax Expense 0 0
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX $ (442) $ 478