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Goodwill and Other Intangible Assets (Schedule of intangible assets subject to amortization) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Finite-lived Intangible Assets [Roll Forward] |  |  |
Intangible assets subject to amortization, beginning balance | $ 98,296 | $ 154,668 |
Intangible assets acquired during the year | 36,980 |  |
Amortization during the year | (26,250) | (57,463) | (70,364)
Currency translation during the year | 1,984 | 1,091 |
Intangible assets subject to amortization, ending balance | 111,010 | 98,296 | 154,668
Customer Relationships [Member] |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Intangible assets subject to amortization, beginning balance | 26,210 | 64,958 |
Intangible assets acquired during the year | 21,792 |  |
Amortization during the year | (6,456) | (38,595) |
Currency translation during the year | (548) | (153) |
Intangible assets subject to amortization, ending balance | 40,998 | 26,210 |
Patents [Member] |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Intangible assets subject to amortization, beginning balance | 71,031 | 88,544 |
Intangible assets acquired during the year | 15,188 |  |
Amortization during the year | (19,336) | (18,747) |
Currency translation during the year | 2,188 | 1,234 |
Intangible assets subject to amortization, ending balance | 69,071 | 71,031 |
Other [Member] |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Intangible assets subject to amortization, beginning balance | 1,055 | 1,166 |
Intangible assets acquired during the year | 0 |  |
Amortization during the year | (458) | (121) |
Currency translation during the year | 344 | 10 |
Intangible assets subject to amortization, ending balance | $ 941 | $ 1,055 |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination. + References No definition available. + Details
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- Definition Amount after 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 of increase (decrease) to assets, excluding financial assets and goodwill, lacking physical substance with a finite life for foreign currency translation adjustments and purchase accounting adjustments. + References No definition available. + Details
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