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Goodwill And Other Intangible Assets (Schedule Of Gross Carrying Values, Accumulated Amortization, And Approximate Amortization Period Of Definite Lived Intangible Assets) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017
Acquired Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 141,213 | $ 139,045
Accumulated amortization | 10,839 | 8,685
Patents [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 3,556 | 3,612
Accumulated amortization | 2,815 | 2,819
Distribution And Manufacturing Rights And Know-How [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 4,059 | 4,059
Accumulated amortization | 1,892 | 1,820
Customer Lists And Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 32,464 | 32,419
Accumulated amortization | 3,936 | 3,552
Other [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 1,485 | 1,439
Accumulated amortization | $ 1,234 | $ 1,076
Minimum [Member] | Acquired Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortization Period | 11 years | 11 years
Minimum [Member] | Distribution And Manufacturing Rights And Know-How [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortization Period | 11 years | 11 years
Minimum [Member] | Customer Lists And Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortization Period | 13 years | 13 years
Maximum [Member] | Acquired Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortization Period | 22 years | 22 years
Maximum [Member] | Patents [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortization Period | 17 years | 17 years
Maximum [Member] | Distribution And Manufacturing Rights And Know-How [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortization Period | 15 years | 15 years
Maximum [Member] | Customer Lists And Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortization Period | 23 years | 23 years
Maximum [Member] | Other [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortization Period | 3 years | 3 years

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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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=66006027&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=66006027&loc=d3e16323-109275 + Details
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