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Acquisitions - Schedule of Supplemental Pro Forma Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Polaris Alpha |  |  |
Business Acquisition [Line Items] |  |  |
Pro forma Revenue |  |  | $ 3,713,804
Pro forma Net Income including noncontrolling interest |  |  | 225,861
OGSystems |  |  |
Business Acquisition [Line Items] |  |  |
Pro forma Revenue |  | $ 3,956,767 | 3,676,894
Pro forma Net Income including noncontrolling interest |  | 134,046 | 205,961
QRC Technologies |  |  |
Business Acquisition [Line Items] |  |  |
Pro forma Revenue |  | 3,976,361 | 3,596,920
Pro forma Net Income |  | 138,692 | $ 221,930
Braxton Science & Technology Group |  |  |
Business Acquisition [Line Items] |  |  |
Pro forma Revenue | $ 4,039,420 | 4,042,810 |
Pro forma Net Income | $ 125,298 | $ 126,076 |

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