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Income Taxes - Summary of Open Tax Positions (Details) | 12 Months Ended
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Dec. 31, 2012
United States Federal [Member] |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2010 - present |
United States State [Member] |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2005 - present |
Germany [Member] |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2010 - present | [1]
Hong Kong [Member] |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2006 - present |
Italy [Member] |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2008 - present | [1]
Sweden [Member] |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2006 - present |
United Kingdom [Member] |  |
Income Tax Contingency [Line Items] |  |
Open Tax Years by Major Tax Jurisdiction | 2010 - present |
[1] | Includes federal as well as local jurisdictions.

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- Definition Identification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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