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Segment Information - Summary of Adjusted EBITDA Business Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Adjusted EBITDA attributable to Parsons Corporation |  |  |  |
Adjusted EBITDA attributable to Parsons Corporation | $ 115,227 | $ 88,549 | $ 302,308 | $ 232,307
Adjusted EBITDA attributable to noncontrolling interests | 12,606 | 14,138 | 34,222 | 22,042
Depreciation and amortization | (30,154) | (29,578) | (87,202) | (90,668)
Interest expense, net | (8,120) | (5,941) | (20,778) | (14,168)
Income tax expense | (15,218) | (13,792) | (41,944) | (27,643)
Equity-based compensation expense | (9,075) | (7,125) | (25,092) | (15,814)
Transaction-related costs | (5,493) | (2,563) | (9,028) | (14,486)
Restructuring expense |  |  | (546) | (213)
Other | 38 | (93) | (2,082) | (1,139)
Net income including noncontrolling interests | 59,811 | 43,595 | 149,858 | 90,218
Net income attributable to noncontrolling interests | 12,364 | 14,024 | 33,617 | 21,685
Net income attributable to Parsons Corporation | 47,447 | 29,571 | 116,241 | 68,533
Federal Solution Segment |  |  |  |
Adjusted EBITDA attributable to Parsons Corporation |  |  |  |
Adjusted EBITDA attributable to Parsons Corporation | 65,039 | 61,004 | 206,827 | 151,287
Critical Infrastructure |  |  |  |
Adjusted EBITDA attributable to Parsons Corporation |  |  |  |
Adjusted EBITDA attributable to Parsons Corporation | $ 50,188 | $ 27,545 | $ 95,481 | $ 81,020

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