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Acquisitions - Schedule of Supplemental Pro Forma Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
BlackHorse Solutions, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Pro forma Revenue | $ 3,699,227 | $ 3,966,809 |
Pro forma Net Income including noncontrolling interests | 93,592 | 108,008 |
Braxton Science & Technology Group |  |  |
Business Acquisition [Line Items] |  |  |
Pro forma Revenue |  | 4,039,420 | $ 4,042,810
Pro forma Net Income including noncontrolling interests |  | $ 125,298 | 126,076
QRC Technologies |  |  |
Business Acquisition [Line Items] |  |  |
Pro forma Revenue |  |  | 3,976,361
Pro forma Net Income including noncontrolling interests |  |  | $ 138,692
O G Systems |  |  |
Business Acquisition [Line Items] |  |  |
Pro forma Revenue | 3,956,767 |  |
Pro forma Net Income including noncontrolling interests | $ 134,046 |  |

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