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Acquisitions - Schedule of Supplemental Pro Forma Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 28, 2018 | Sep. 30, 2019 | Sep. 28, 2018
Polaris Alpha |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Pro forma revenue |  | $ 976,157 |  | $ 2,784,864
Pro forma net income including noncontrolling interests |  | 46,848 |  | 179,071
OGSystems |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Pro forma revenue | $ 1,023,277 | 1,007,793 | $ 2,919,379 | 2,715,572
Pro forma net income including noncontrolling interests | 61,293 | 39,224 | 118,896 | 196,905
QRC Technologies |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Pro forma revenue | 1,026,831 | 987,343 | 2,938,973 | 2,657,105
Pro forma net income including noncontrolling interests | $ 65,782 | $ 44,944 | $ 117,399 | $ 212,728

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