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Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 27, 2014 | Sep. 27, 2014 Reported Value Measurement | Dec. 28, 2013 Reported Value Measurement | Sep. 27, 2014 Estimate of Fair Value Measurement | Dec. 28, 2013 Estimate of Fair Value Measurement | Sep. 27, 2014 Recurring | Dec. 28, 2013 Recurring | Sep. 27, 2014 Recurring Level 1 | Dec. 28, 2013 Recurring Level 1 | Sep. 27, 2014 Recurring Level 2 | Dec. 28, 2013 Recurring Level 2 | Sep. 27, 2014 Recurring Level 3 | Dec. 28, 2013 Recurring Level 3
Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds and time deposits |  |  |  |  |  | $ 5,079 |  | $ 17,090 |  | $ 5,079 |  | $ 17,090 |  | $ 0 |  | $ 0 |  | $ 0 |  | $ 0 |
Banker's acceptance drafts |  |  |  |  |  | 9,988 | [1] | 10,765 | [1] | 0 | [1] | 0 | [1] | 9,988 | [1] | 10,765 | [1] | 0 | [1] | 0 | [1]
Forward currency-exchange contracts |  |  |  |  |  | 169 |  | 97 |  | 0 |  | 0 |  | 169 |  | 97 |  | 0 |  | 0 |
Liabilities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency-exchange contracts |  |  |  |  |  | 2 |  | 23 |  | 0 |  | 0 |  | 2 |  | 23 |  | 0 |  | 0 |
Interest rate swap agreement |  |  |  |  |  | 532 |  | 773 |  | 0 |  | 0 |  | 532 |  | 773 |  | 0 |  | 0 |
Contingent consideration | 1,175 |  |  |  |  | 1,175 | [2] |  |  | 0 | [2] |  |  | 0 | [2] |  |  | 1,175 | [2] |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unobservable Input [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition | 1,205 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current period expense | 60 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Currency translation | (90) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at end of period | 1,175 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt obligations |  | $ 22,375 | $ 38,010 | $ 22,375 | $ 38,010 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Included in accounts receivable in the accompanying condensed consolidated balance sheet.
[2] | Included in other current liabilities in the accompanying condensed consolidated balance sheet.

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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Amounts receivable from customers on short-term negotiable time drafts drawn on and accepted by the institution (also known as banker's acceptance transactions) that are outstanding on the reporting date. + References No definition available. + Details
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- Definition 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 -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + 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) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13495-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226008-175313 + Details
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- Definition Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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