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Net Investment Hedge (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Oct. 01, 2017 | Sep. 30, 2018 | Oct. 01, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Foreign currency translation adjustment | $ (17,904) | $ (19,535) | $ 10,943 | $ (46,478)
Senior Subordinate Notes |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Foreign currency translation adjustment |  |  | $ 46,300 |
Senior Subordinate Notes | 4.125% Senior subordinated notes due 2026 |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Foreign currency translation adjustment |  |  |  | $ 25,300

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