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Acquisitions and Divestitures - Divestitures (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Mar. 12, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Income tax expense |  | $ 35,343 | $ 17,427 | $ 95,987 | $ 63,759
Disposed of by Sale | CiDRA Precision Services |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Proceeds from sale of businesses, net of cash sold | $ 1,000 |  |  |  |
Gain on sale | 500 |  |  |  |
Income tax expense | 100 |  |  |  |
Revenue | $ 900 |  |  |  |

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