Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Sep. 25, 2015	Dec. 31, 2014
Cash equivalents	$ 22,976	$ 23,143
Deferred compensation plans	3,636	2,941
Deferred compensation plans liability	3,636	2,941
Assets, Fair Value Disclosure	31,761	34,073
Liabilities, Fair Value Disclosure	11,372	14,253
Fair Value, Inputs, Level 1 [Member]
Cash equivalents	22,976	23,143
Assets, Fair Value Disclosure	22,976	23,143
Fair Value, Inputs, Level 2 [Member]
Deferred compensation plans	3,636	2,941
Deferred compensation plans liability	3,636	2,941
Assets, Fair Value Disclosure	8,785	10,930
Liabilities, Fair Value Disclosure	11,372	14,253
Foreign currency contracts related to customer sales contracts
Foreign currency contracts designated as hedges, Assets	1,869	4,524
Foreign currency contracts not designated as hedges, Assets	1,754	1,007
Foreign currency contracts designated as hedges, Liabilities	6,247	7,163
Foreign currency contracts not designated as hedges, Liability	494	2,793
Foreign currency contracts related to customer sales contracts \| Fair Value, Inputs, Level 2 [Member]
Foreign currency contracts designated as hedges, Assets	1,869	4,524
Foreign currency contracts not designated as hedges, Assets	1,754	1,007
Foreign currency contracts designated as hedges, Liabilities	6,247	7,163
Foreign currency contracts not designated as hedges, Liability	494	2,793
Foreign currency contracts related to supplier purchase contracts
Foreign currency contracts designated as hedges, Assets	1,023	1,980
Foreign currency contracts not designated as hedges, Assets	503	478
Foreign currency contracts designated as hedges, Liabilities	354	695
Foreign currency contracts not designated as hedges, Liability	641	661
Foreign currency contracts related to supplier purchase contracts \| Fair Value, Inputs, Level 2 [Member]
Foreign currency contracts designated as hedges, Assets	1,023	1,980
Foreign currency contracts not designated as hedges, Assets	503	478
Foreign currency contracts designated as hedges, Liabilities	354	695
Foreign currency contracts not designated as hedges, Liability	$ 641	$ 661

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

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No definition available.

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Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Aggregate fair value of all derivative assets designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

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Aggregate fair value of all derivative liabilities designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations.

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Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959

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Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments.

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Fair value of financial and nonfinancial obligations.

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