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Acquisitions and Divestitures (Additional Information - Divestitures) (Details) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 7 Months Ended | 8 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 09, 2016 | Jul. 29, 2016 | Jul. 31, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Jul. 29, 2016 | Jul. 31, 2015 | Sep. 09, 2016 | Sep. 30, 2016 | Sep. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of businesses |  |  |  | $ (2,067) | $ 18,070 |  |  |  | $ (2,067) | $ 18,070
Revenue |  |  |  | $ 530,356 | $ 503,791 |  |  |  | $ 1,582,624 | $ 1,520,870
Disposed of by Sale | Hydra-Stop Product Line |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from sale of business |  | $ 15,000 |  |  |  |  |  |  |  |
Gain (loss) on sale of businesses |  | 5,800 |  |  |  |  |  |  |  |
Additional proceeds from sale of business |  | $ 2,000 |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  | $ 7,500 |  |  |  |
Disposed of by Sale | Melles Griot KK Subsidiary |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from sale of business | $ 17,500 |  |  |  |  |  |  |  |  |
Gain (loss) on sale of businesses | $ (7,900) |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  | $ 13,100 |  |
Disposed of by Sale | Ismatec Product Line |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from sale of business |  |  | $ 27,700 |  |  |  |  |  |  |
Gain (loss) on sale of businesses |  |  | $ 18,100 |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  | $ 5,300 |  |  |

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