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BUSINESS ACQUISITIONS AND DIVESTITURE - Agilux, Additional Information (Details) - Agilux - USD ($) $ in Thousands |  | 12 Months Ended
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Sep. 28, 2016 | Dec. 30, 2017 | Dec. 31, 2016
Business Acquisition [Line Items] |  |  |
Purchase price | $ 64,900 |  |
Purchase price allocation | 62,025 |  |
Cash acquired | $ 2,900 |  |
Transaction and integration costs |  | $ 300 | $ 1,700

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