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Shareholders' Equity (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jul. 01, 2017 | Jun. 30, 2018 | Jul. 01, 2017
Changes In Components Of OCI [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment and Other |  | $ (146,807) | $ 133,544 | $ (101,838) | $ 170,377
Other Comprehensive Income (Loss) Unrealized gain (loss) on investment securities, net |  | 0 | 1,554 | 0 | 3,282
Other Comprehensive Income, Unrealized Gain on Derivatives Arising During Period, Net |  | 231 | (547) | 459 | (450)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax |  | (613) | (505) | (895) | (911)
Net change in accumulated other comprehensive income (loss) |  | (144,304) | 132,456 | (120,926) | 170,933
Other comprehensive income before reclassifications [Member] |  |  |  |  |
Changes In Components Of OCI [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment and Other | [1] | (146,203) | 132,256 | (99,803) | 169,837
Other Comprehensive Income (Loss) Unrealized gain (loss) on investment securities, net |  | 0 | 1,554 | 0 | 3,282
Other Comprehensive Income, Unrealized Gain on Derivatives Arising During Period, Net |  | 0 | (647) | 0 | (647)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax |  | 0 | (48) | 0 | (43)
Other comprehensive income before reclassifications [Member] | Intra-entity foreign currency transactions [Member] |  |  |  |  |
Changes In Components Of OCI [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment and Other |  | 26,698 | (36,503) | 14,774 | (36,180)
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |  |
Changes In Components Of OCI [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment and Other |  | 1,055 | (1,312) | (123) | (2,647)
Other Comprehensive Income (Loss) Unrealized gain (loss) on investment securities, net |  | 0 | 0 | 0 | 0
Other Comprehensive Income, Unrealized Gain on Derivatives Arising During Period, Net |  | 231 | 100 | 459 | 197
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax |  | 613 | 553 | 895 | 954
Cumulative impact of newly adopted accounting standard updates [Member] |  |  |  |  |
Changes In Components Of OCI [Line Items] |  |  |  |  |
Reclassification to retained earnings | [2] | $ 0 | $ 0 | $ (22,354) | $ 0
[1] | Includes intra-entity foreign currency transactions that are of a long-term investment nature of $26,698 and $14,774 for the second quarter and first six months of 2018 and $(36,503) and $(36,180) for the second quarter and first six months of 2017, respectively.
[2] | Amounts relate to unrealized gains and losses on investments and stranded tax effects reclassified from "Accumulated other comprehensive income" to "Retained earnings" in accordance with ASU No. 2018-02 and ASU No. 2016-01 (Note B).

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