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Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets (Net intangible assets) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | --- | ---
Intangible Assets, Net: |  |  |
Cost | $ 633,985 | $ 624,103 |
Acquisitions | 36,980 |  |
Currency translation | 1,984 | 9,882 |
Accumulated amortization | 561,939 | 535,689 |
Net Value | 111,010 | 98,296 | 154,668
Customer Relationships [Member] |  |  |
Intangible Assets, Net: |  |  |
Cost | 351,873 | 347,447 |
Acquisitions | 21,792 |  |
Currency translation | (548) | 4,426 |
Accumulated amortization | 332,119 | 325,663 |
Net Value | 40,998 | 26,210 | 64,958
Patents [Member] |  |  |
Intangible Assets, Net: |  |  |
Cost | 280,623 | 275,178 |
Acquisitions | 15,188 |  |
Currency translation | 2,188 | 5,445 |
Accumulated amortization | 228,928 | 209,592 |
Net Value | 69,071 | 71,031 | 88,544
Other Intangible Assets [Member] |  |  |
Intangible Assets, Net: |  |  |
Cost | 1,489 | 1,478 |
Acquisitions | 0 |  |
Currency translation | 344 | 11 |
Accumulated amortization | 892 | 434 |
Net Value | $ 941 | $ 1,055 |

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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