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Variable Interest Entities (VIEs) (Details) - USD ($)
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Variable Interest Entity [Line Items]      
Assets, current $ 3,489,070,000   $ 3,286,667,000
Liabilities, current 2,628,163,000   2,332,700,000
Future funding commitments 0    
Revenue $ 1,246,633,000 $ 1,048,987,000  
Purple Line Extension Section 2 and Section 3      
Variable Interest Entity [Line Items]      
Percent interest in the joint venture 75.00%    
Related Party | Purple Line Extension Section 2 and Section 3      
Variable Interest Entity [Line Items]      
Revenue $ 2,800,000,000    
Related Party | Manhattan Jail Project      
Variable Interest Entity [Line Items]      
Revenue $ 3,760,000,000    
Percent interest in the joint venture 75.00%    
O&G | Purple Line Extension Section 2 and Section 3      
Variable Interest Entity [Line Items]      
Noncontrolling interest, ownership percentage by noncontrolling owners 25.00%    
O&G | Related Party | Manhattan Jail Project      
Variable Interest Entity [Line Items]      
Noncontrolling interest, ownership percentage by noncontrolling owners 25.00%    
Variable Interest Entity, Not Primary Beneficiary      
Variable Interest Entity [Line Items]      
Assets, current $ 39,900,000   26,700,000
Assets, noncurrent 2,500,000    
Liabilities, current 38,600,000   24,800,000
VIEs      
Variable Interest Entity [Line Items]      
Assets, current 592,100,000   475,600,000
Assets, noncurrent 15,900,000   19,900,000
Liabilities, current $ 461,900,000   $ 385,500,000