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Segments Information - Summary of Adjusted EBITDA Business Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 30, 2018
Adjusted EBITDA attributable to Parsons Corporation |  |
Adjusted EBITDA attributable to Parsons Corporation | $ 64,425 | $ 43,810
Adjusted EBITDA attributable to noncontrolling interests | 3,749 | 3,920
Depreciation and amortization | (30,591) | (9,009)
Interest expense, net | (7,815) | (3,258)
Income tax provision | (1,886) | (5,353)
Litigation related expenses |  | (2,330)
Amortization of deferred gain resulting from sale-leaseback transactions |  | 1,813
Transaction related costs | (9,355) | (125)
Restructuring | (2,218) |
HCM software implementation costs | (2,912) |
Other | (11) | (366)
Net income including noncontrolling interests | 13,386 | 29,102
Net income attributable to noncontrolling interests | 3,645 | 3,815
Net income attributable to Parsons Corporation | 9,741 | 25,287
Federal Solution Segment |  |
Adjusted EBITDA attributable to Parsons Corporation |  |
Adjusted EBITDA attributable to Parsons Corporation | 38,866 | 20,154
Critical Infrastructure |  |
Adjusted EBITDA attributable to Parsons Corporation |  |
Adjusted EBITDA attributable to Parsons Corporation | $ 25,559 | $ 23,656

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