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Fair Value Measurements of Financial Instruments (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands | Jan. 02, 2016 | Jan. 03, 2015
--- | --- | ---
Assets Fair Value Disclosure [Abstract] |  |
Derivative financial instruments | $ (1,252) | $ (1,374)
Government Securities [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Available-for-sale securities, fair value disclosure | 9,663 | 9,835
Corporate Bonds [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Available-for-sale securities, fair value disclosure | 2,405 | 2,205
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Derivative financial instruments | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Government Securities [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Available-for-sale securities, fair value disclosure | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Corporate Bonds [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Available-for-sale securities, fair value disclosure | 0 | 0
Significant Other Observable Inputs (Level 2) [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Derivative financial instruments | (1,252) | (1,374)
Significant Other Observable Inputs (Level 2) [Member] | Government Securities [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Available-for-sale securities, fair value disclosure | 9,663 | 9,835
Significant Other Observable Inputs (Level 2) [Member] | Corporate Bonds [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Available-for-sale securities, fair value disclosure | 2,405 | 2,205
Significant Unobservable Inputs (Level 3) [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Derivative financial instruments | 0 | 0
Significant Unobservable Inputs (Level 3) [Member] | Government Securities [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Available-for-sale securities, fair value disclosure | 0 | 0
Significant Unobservable Inputs (Level 3) [Member] | Corporate Bonds [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Available-for-sale securities, fair value disclosure | $ 0 | $ 0

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562 + Details
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