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Acquisitions - Schedule of Supplemental Pro Forma Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
BlackHorse Solutions, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Pro forma Revenue | $ 957,498 | $ 1,017,325 | $ 2,748,559 | $ 2,988,153
Pro forma Net Income including noncontrolling interests | 31,070 | 45,195 | 56,694 | 82,921
Braxton Science & Technology Group |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Pro forma Revenue | 956,050 | 1,046,002 | 2,710,103 | 3,050,708
Pro forma Net Income including noncontrolling interests | $ 27,463 | $ 48,072 | $ 55,391 | $ 93,672

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