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Other Intangible Assets, Other than Goodwill (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Amortized intangible assets: |  |
Gross carrying amount | $ 20,716 | $ 15,281
Weighted average amortization period | 7 years | 7 years
Accumulated amortization | 13,295 | 10,787
Unamortized intangible assets: |  |
In-process research and development | 722 |
Technology [Member] |  |
Amortized intangible assets: |  |
Gross carrying amount | 11,774 | 6,339
Weighted average amortization period | 7 years | 7 years
Accumulated amortization | 5,762 | 4,495
Customer relationship [Member] |  |
Amortized intangible assets: |  |
Gross carrying amount | 8,100 | 8,100
Weighted average amortization period | 7 years | 7 years
Accumulated amortization | 6,847 | 5,689
Patents [Member] |  |
Amortized intangible assets: |  |
Gross carrying amount | 842 | 842
Weighted average amortization period | 6 years | 6 years
Accumulated amortization | $ 686 | $ 603

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- Definition The amount of purchased research and development assets that are acquired in a business combination have no alternative future use and are therefore written off in the period of acquisition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 4 -Paragraph 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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FASB -Name Statement of Financial Accounting Standard (FAS) -Number 2 -Paragraph 13 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph g -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. + Details
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