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Investments in and Advances to Joint Ventures - Summary of Financial Information for Consolidated Joint Ventures (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Current assets | $ 1,589,196 |  | $ 1,589,196 |  | $ 1,526,409
Total assets | 3,451,182 |  | 3,451,182 |  | 3,450,368
Current liabilities | 1,130,953 |  | 1,130,953 |  | 1,144,382
Total liabilities | 1,744,930 |  | 1,744,930 |  | 1,789,612
Total joint venture equity | 1,667,548 |  | 1,667,548 |  | 1,629,890
Revenue | 979,459 | $ 989,742 | 1,950,452 | $ 1,894,147 |
Costs | 749,324 | 784,723 | 1,518,956 | 1,498,960 |
Net income attributable to Parsons Corporation | 23,299 | 40,259 | 36,272 | 50,000 |
Net income (loss) attributable to noncontrolling interests | 7,826 | (114) | 9,224 | 3,531 |
Consolidated Joint Ventures |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Current assets | 324,721 |  | 324,721 |  | 255,167
Noncurrent assets | 1,947 |  | 1,947 |  | 2,860
Total assets | 326,668 |  | 326,668 |  | 258,027
Current liabilities | 246,019 |  | 246,019 |  | 193,583
Total liabilities | 246,019 |  | 246,019 |  | 193,583
Total joint venture equity | 80,649 |  | 80,649 |  | $ 64,444
Revenue | 117,889 | 109,004 | 218,167 | 224,108 |
Costs | 101,935 | 106,781 | 199,085 | 213,987 |
Net income attributable to Parsons Corporation | 15,954 | 2,223 | 19,082 | 10,121 |
Net income (loss) attributable to noncontrolling interests | $ 7,826 | $ (114) | $ 9,224 | $ 3,531 |

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