Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Acquisitions (Recognition of intangible assets) (Details)

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Acquisitions (Recognition of intangible assets) (Details) (Solid Concepts Inc. [Member], USD $)
In Thousands, unless otherwise specified
0 Months Ended
Jul. 14, 2014
Acquisitions [Line Items]  
Intangible assets, Amount $ 36,477
Customer relationships - additive manufacturing [Member]
 
Acquisitions [Line Items]  
Intangible assets, Amount 21,578
Intangible assets, Weighted Average Life 6 years 6 months
Customer relationships - traditional [Member]
 
Acquisitions [Line Items]  
Intangible assets, Amount $ 14,899
Intangible assets, Weighted Average Life 6 years 6 months