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 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total other comprehensive income (loss), Before-Tax Amount $ (1,790) $ 3,905 $ (4,503) $ 6,749
Total other comprehensive income (loss), Tax Expense 311 (643) 793 (1,211)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX (1,479) 3,262 (3,710) 5,538
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 (1,421) 2,589 (3,692) 4,955
Total other comprehensive income (loss), Tax Expense 311 (643) 793 (1,211)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX (1,110) 1,946 (2,899) 3,744
Defined benefit pension plan adjustments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total other comprehensive income (loss), Before-Tax Amount 435 395 866 808
Total other comprehensive income (loss), Tax Expense (120) (106) (238) (217)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX 315 289 628 591
Foreign currency translation adjustments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total other comprehensive income (loss), Before-Tax Amount (546) 2,477 (1,123) 3,264
Total other comprehensive income (loss), Tax Expense 63 (333) 144 (451)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX (483) 2,144 (979) 2,813
Unrealized gain (loss) in fair value of investments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total other comprehensive income (loss), Before-Tax Amount (1,679) 1,033 (4,246) 2,677
Total other comprehensive income (loss), Tax Expense 368 (204) 887 (543)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX (1,311) 829 (3,359) 2,134
Less: Other comprehensive income (loss) attributable to noncontrolling interests        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total other comprehensive income (loss), Before-Tax Amount (369) 1,316 (811) 1,794
Total other comprehensive income (loss), Tax Expense 0 0 0 0
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX $ (369) $ 1,316 $ (811) $ 1,794