Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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Fixed interest rate related to the interest rate derivative.

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

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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.

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Amount before tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Financial Instruments Measured at Fair Value - Derivatives (Details) € in Thousands, $ in Thousands	3 Months Ended
	Mar. 30, 2019 USD ($)	Mar. 31, 2018 USD ($)	Mar. 30, 2019 EUR (€) Rate	Mar. 30, 2019 USD ($) Rate	Dec. 31, 2018 USD ($)
Derivatives, Fair Value [Line Items]
Notional Amount of Derivative Contracts				$ 867,361	$ 607,747
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ 3,170	$ (6,045)
Interest rate swaps designated as fair value hedges [Member] \| Notes Due in 2020 [Member]
Derivatives, Fair Value [Line Items]
Debt Instrument, Description of Variable Rate Basis	6 mo. USD LIBOR +
Notional Amount of Derivative Contracts				$ 50,000
Derivative, Fixed Interest Rate			6.00%	6.00%
Derivative, Variable Interest Rate \| Rate			3.896%	3.896%
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ (319)	(303)
Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	3,489	(5,742)
Foreign Exchange Contract [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income, Effective Portion, Net	5,953	$ (1,078)
Net Investment Hedging [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income, Effective Portion, Net	6,592
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	$ 1,406
Maturity March 2023 [Member] \| Foreign Exchange Forward [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivative Contracts \| €			€ 50,000
Maturity September 2024 [Member] \| Foreign Exchange Forward [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivative Contracts \| €			50,000
Maturity April 2025 [Member] \| Foreign Exchange Forward [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivative Contracts \| €			100,000
Maturity January 2028 [Member] \| Foreign Exchange Forward [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivative Contracts \| €			100,000
All Maturities [Member] \| Foreign Exchange Forward [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Derivative Contracts \| €			€ 300,000