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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- 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

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- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e689-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

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Derivative Financial Instruments - Cash Flow Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Apr. 01, 2017	Sep. 29, 2018	Sep. 30, 2017	Jul. 31, 2016
Derivative Financial Instruments
Reclassification of unrealized gains included in net income	$ (131)		$ (164)	$ 1,808
Cash flow hedges \| Foreign currency forward contracts
Derivative Financial Instruments
Notional value	$ 9,000		$ 9,000
Cash flow hedges \| Interest rate swaps
Derivative Financial Instruments
Notional value					$ 72,500
Reclassification of unrealized gains included in net income		$ 1,800
Low end of range \| Cash flow hedges \| Foreign currency forward contracts
Derivative Financial Instruments
Maturity of contracts			1 month
High end of range \| Cash flow hedges \| Foreign currency forward contracts
Derivative Financial Instruments
Maturity of contracts			12 months