v3.26.1
Investments in and Advances to Joint Ventures - Summary of Financial Information for Unconsolidated Joint Ventures (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Schedule Of Equity Method Investments [Line Items]      
Current assets $ 2,594,140   $ 2,683,543
Total assets 6,012,108   5,769,534
Current liabilities 1,479,543   1,531,664
Total liabilities 3,257,951   3,001,862
Total joint venture equity 2,649,613   2,642,020
Investments in and advances to unconsolidated joint ventures 162,296   148,640
Revenue 1,491,176 $ 1,554,360  
Costs 1,133,756 1,200,377  
Net income attributable to Parsons Corporation 52,926 66,203  
Equity in earnings of unconsolidated joint ventures 6,156 (687)  
Unconsolidated Joint Ventures      
Schedule Of Equity Method Investments [Line Items]      
Current assets 1,444,215   1,549,367
Noncurrent assets 430,998   439,496
Total assets 1,875,213   1,988,863
Current liabilities 953,170   1,046,970
Noncurrent liabilities 477,343   469,833
Total liabilities 1,430,513   1,516,803
Total joint venture equity 444,700   472,060
Investments in and advances to unconsolidated joint ventures 162,296   $ 148,640
Revenue 295,003 524,556  
Costs 276,896 520,876  
Net income attributable to Parsons Corporation 18,107 3,680  
Unconsolidated Joint Ventures      
Schedule Of Equity Method Investments [Line Items]      
Equity in earnings of unconsolidated joint ventures $ 6,156 $ (687)