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Acquisitions (Summary of Intangible Assets Acquired) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Total intangible assets, amount $ 168,386 $ 490,176 $ 19,500
Makerbot [Member]
      
Total intangible assets, amount 168,386    
Objet [Member]
      
Total intangible assets, amount   490,176  
Solidscape, Inc [Member]
      
Total intangible assets, amount     19,500
Developed Technology [Member]
      
Total intangible assets, amount 43,227 374,126 11,750
Weighted Average Life - Years 5 years 9 years 7 months 6 days 6 years 8 months 12 days
Trade name [Member]
      
Total intangible assets, amount 42,134 15,291 1,150
Weighted Average Life - Years 11 years 9 years 15 years
Customer relationships - Distributors [Member]
      
Total intangible assets, amount 19,315    
Weighted Average Life - Years 10 years    
Customer relationships - Direct [Member]
      
Total intangible assets, amount 3,435 72,679 5,100
Weighted Average Life - Years 1 year 10 years 15 years
Non-compete Agreement [Member]
      
Total intangible assets, amount 10,004   350
Weighted Average Life - Years 4 years   3 years
IPR&D - Printers [Member]
      
Total intangible assets, amount 34,189 28,080 1,150
Weighted Average Life - Years
Indefinite
Indefinite
 
IPR&D - Peripherals [Member]
      
Total intangible assets, amount $ 16,082    
Weighted Average Life - Years
Indefinite