v3.25.4
Investments in and Advances to Joint Ventures - Summary of Financial Information for Consolidated Joint Ventures (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Schedule Of Equity Method Investments [Line Items]      
Current assets $ 2,683,543 $ 2,462,400  
Total assets 5,769,534 5,487,962  
Current liabilities 1,531,664 1,915,644  
Total liabilities 3,001,862 2,953,473  
Total joint venture equity 2,642,020 2,416,389  
Revenue 6,364,245 6,750,576 $ 5,442,749
Costs 4,932,711 5,344,154 4,236,735
Net income attributable to Parsons Corporation 241,139 235,053 161,149
Net income attributable to noncontrolling interests 67,725 55,612 46,766
Consolidated Joint Ventures      
Schedule Of Equity Method Investments [Line Items]      
Current assets 542,877 519,450  
Noncurrent assets 7,961 9,841  
Total assets 550,838 529,291  
Current liabilities 301,891 296,774  
Noncurrent Liabilities 3,417 2,203  
Total liabilities 305,308 298,977  
Total joint venture equity 245,530 230,314  
Revenue 819,562 788,702 708,391
Costs 683,298 676,258 613,186
Net income attributable to Parsons Corporation 136,264 112,444 95,205
Net income attributable to noncontrolling interests $ 67,725 $ 55,612 $ 46,766