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Derivative and Hedgiing Activities Derivative and Hedging Activities (Details) (Foreign Exchange Forward [Member], Not Designated as Hedging Instrument [Member], USD $) In Thousands, unless otherwise specified |  |  |  |  | 3 Months Ended | 9 Months Ended
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Sep. 26, 2014 Prepaid Expenses and Other Current Assets [Member] | Dec. 31, 2013 Prepaid Expenses and Other Current Assets [Member] | Sep. 26, 2014 Accrued Liabilities [Member] | Dec. 31, 2013 Accrued Liabilities [Member] | Sep. 26, 2014 Other Income [Member] | Sep. 27, 2013 Other Income [Member] | Sep. 26, 2014 Other Income [Member] | Sep. 27, 2013 Other Income [Member]
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |
Foreign currency contracts | $ 19 | $ 196 |  |  |  |  |  |
Foreign currency contracts |  |  | (331) | (195) |  |  |  |
Gain (loss) recorded in other income (expense), net |  |  |  |  | $ (95) | $ (157) | $ (201) | $ 658

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- Definition Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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- Definition Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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- Definition Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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