General (Details) - 2.00% Senior Notes due January 14, 2022 $ in Thousands	6 Months Ended
Jun. 30, 2018 USD ($)	Jul. 01, 2017 USD ($)	Jun. 09, 2015 EUR (€)
Debt Instrument [Line Items]
Aggregate principal amount of debts \| €			€ 500,000,000
Interest rate percentage	2.00%		2.00%
Change in debt value	$ (15,984)	$ 45,314
Change in debt value, net of taxes	$ (11,288)	$ 28,321

Change In Unrealized Gain (Loss) On Hedged Item In Foreign Currency Fair Value Hedge, Net of Tax

No definition available.

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- Definition

Amount of the increase (decrease) in fair value of the hedged item in a foreign currency fair value hedge which was recognized in earnings, net of offsets by the gain (loss) on the hedging instrument to the extent that the fair value hedge was determined to be effective.

+ References

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
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-SubTopic 30
-Section 55
-Paragraph 8
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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