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Derivative Financial Instruments (Details) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Dec. 29, 2018 USD ($) | Dec. 29, 2018 USD ($) | Dec. 30, 2017 USD ($) contract | Dec. 31, 2016 USD ($) | Jul. 31, 2016 USD ($)
Derivative Financial Instruments |  |  |  |  |
Reclassification of unrealized gains included in net income |  | $ (316) | $ 1,808 | $ (249) |
Non-designated Hedges | Foreign currency forward contracts |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional value |  |  | $ 2,400 |  |
Number of foreign currency forward contract held | contract |  |  | 1 |  |
Non-designated Hedges | Foreign currency forward contracts | Interest income and other, net |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) |  | 105 | $ (207) | $ (92) |
Cash flow hedges | Interest rate swaps |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional value |  |  |  |  | $ 72,500
Reclassification of unrealized gains included in net income |  |  | $ 1,800 |  |
Cash flow hedges | Foreign currency forward contracts |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional value | $ 8,800 | $ 8,800 |  |  |
Cash flow hedges | Low end of range | Foreign currency forward contracts |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Maturity of contracts | 1 month |  |  |  |
Cash flow hedges | High end of range | Foreign currency forward contracts |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Maturity of contracts | 12 months |  |  |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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