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Goodwill and Other Intangible Assets (Details 1) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Amortizable intangible assets: |  |
Gross Carrying amount | $ 43,185 | $ 43,019
Accumulated Amortization | 35,265 | 32,702
Total | 7,920 | 10,317
Customer relationships [Member] |  |
Amortizable intangible assets: |  |
Gross Carrying amount | 33,759 | 33,379
Accumulated Amortization | 26,644 | 24,925
Total | 7,115 | 8,454
Research content [Member] |  |
Amortizable intangible assets: |  |
Gross Carrying amount | 7,043 | 6,929
Accumulated Amortization | 7,043 | 6,209
Total |  | 720
Technology [Member] |  |
Amortizable intangible assets: |  |
Gross Carrying amount | 1,507 | 1,507
Accumulated Amortization | 702 | 442
Total | 805 | 1,065
Trademarks [Member] |  |
Amortizable intangible assets: |  |
Gross Carrying amount | 876 | 876
Accumulated Amortization | 876 | 876
Other [Member] |  |
Amortizable intangible assets: |  |
Gross Carrying amount |  | 328
Accumulated Amortization |  | 250
Total |  | $ 78

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