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Acquisitions and Divestitures (Divestitures) (Details) - USD ($) $ in Thousands |  |  |  |  | 3 Months Ended | 7 Months Ended | 8 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 30, 2016 | Oct. 10, 2016 | Sep. 09, 2016 | Jul. 29, 2016 | Mar. 31, 2017 | Mar. 31, 2016 | Jul. 29, 2016 | Sep. 09, 2016 | Oct. 10, 2016 | Dec. 31, 2016 | Dec. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  | $ 553,552 | $ 502,572 |  |  |  |  |
Hydra-Stop Product Line | Disposed of by Sale |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |
Earnings for achievement |  |  |  |  |  |  |  |  |  | $ 1,000 |
Possible earnings for achievement |  |  |  |  |  |  |  |  |  | $ 1,000 |
Revenue |  |  |  |  |  |  | $ 7,500 |  |  |  |
Melles Griot KK Subsidiary | Disposed of by Sale |  |  |  |  |  |  |  |  |  |  |
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 |  |  |
IETG and 40Seven Subsidiaries | Disposed of by Sale |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of business |  | $ 2,700 |  |  |  |  |  |  |  |  |
Gain (loss) on sale of businesses |  | $ (4,200) |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 8,300 |  |
Korea Electro-Optics Co., Ltd. (CVI Korea) | Disposed of by Sale |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of business | $ 3,800 |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of businesses | $ (16,000) |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | $ 11,700

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