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Restructuring Charges (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
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Sep. 27, 2014 | Sep. 28, 2013
Restructuring reserve balance |  |
Balance at the beginning of the period |  | $ 2,979
Amounts paid, net of amounts received |  | (1,418)
Adjustments and effect of foreign currency translation |  | (321)
Balance at the end of the period |  | 1,240
Office Vacancies |  |
Restructuring reserve balance |  |
Balance at the beginning of the period | 1,170 | 2,106
Amounts paid, net of amounts received | (549) | (689)
Adjustments and effect of foreign currency translation | 20 | (177)
Balance at the end of the period | 641 | 1,240
Employee Workforce Reduction |  |
Restructuring reserve balance |  |
Balance at the beginning of the period |  | 873
Amounts paid, net of amounts received |  | (729)
Adjustments and effect of foreign currency translation |  | $ (144)

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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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- Details
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- Definition The amount of change in the restructuring reserve related to foreign currency translation adjustments and any other adjustments not separately disclosed or provided for elsewhere in the Taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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