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Share-Based Compensation (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized for grant 1,243,070      
Total granted and outstanding (in shares) 2,167,765 2,275,265 2,279,015 2,943,044
Aggregate Intrinsic value $ 600,000      
Weighted average remaining contractual term of outstanding stock options 3 years 9 months 18 days      
Number of vested and exercisable stock options (in shares) 1,842,765      
Stock options exercised, intrinsic value $ 600,000      
Vested and exercisable stock options, weighted average exercise price (in dollars per share) $ 20.77      
Weighted average remaining contractual term of outstanding stock options 3 years      
Stock options granted but not vested (in shares) 325,000      
Stock options granted, weighted-average exercise price (in dollars per share) $ 16.37      
Stock options granted, weighted-average remaining contractual life 8 years 6 months      
Stock options granted and expected to vest (in shares) 187,500      
Stock options granted and not expected to vest (in shares) 137,500      
Share-based compensation expense $ 11,642,000 $ 11,833,000 $ 19,143,000  
Share based compensation, tax benefits 1,200,000 1,300,000 2,900,000  
Employee        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 10,000,000 10,200,000 17,500,000  
Non-employee Directors        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 1,600,000 $ 1,600,000 1,600,000  
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option expense $ 2,000,000      
Weighted average period over which unrecognized compensation cost is expected to be recognized 1 year 10 months 24 days      
Restricted Stock Units, Guaranteed Minimum Payouts        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock units with guaranteed minimum payouts outstanding (in shares) 260,000 270,000    
Stock units with guaranteed minimum payouts outstanding, weighted-average grant date fair value (in dollars per share) $ 27.53 $ 27.80    
Stock units with guaranteed minimum payouts outstanding, recognized liabilities $ 4,800,000 $ 2,400,000    
Paid to settle share-based awards 300,000 300,000 0  
Unrestricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Fair value of unrestricted stock units issued $ 1,600,000 $ 1,700,000 $ 1,500,000  
Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock units with guaranteed minimum payouts outstanding (in shares) 1,188,851 1,035,000 1,715,000 1,469,000
Stock units with guaranteed minimum payouts outstanding, weighted-average grant date fair value (in dollars per share) $ 18.98 $ 21.85 $ 25.19 $ 27.27
Fair value of restricted stock units that vested during period $ 5,300,000 $ 4,100,000 $ 3,100,000  
Restricted stock expense $ 12,900,000      
Weighted average period over which unrecognized compensation cost is expected to be recognized 1 year 10 months 24 days      
Cash-settled Performance Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock units with guaranteed minimum payouts outstanding (in shares) 398,852 0 0 0
Stock units with guaranteed minimum payouts outstanding, weighted-average grant date fair value (in dollars per share) $ 20.39 $ 0 $ 0 $ 0
Stock option expense $ 6,800,000      
Weighted average period over which unrecognized compensation cost is expected to be recognized 2 years      
Amended and Restated Tutor Perini Corporation Long-Term Incentive Plan (“Incentive Plan”) | Restricted Stock Units And Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Aggregate number of shares outstanding, historical awards that either have not vested or have vested but not exercised 3,356,616