Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Acquisitions (Schedule of Assumptions Applied in Merger) (Details)

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Acquisitions (Schedule of Assumptions Applied in Merger) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Makerbot [Member]
Dec. 31, 2012
Objet [Member]
Dec. 31, 2012
Objet [Member]
Minimum [Member]
Dec. 31, 2012
Objet [Member]
Maximum [Member]
Business Acquisition [Line Items]        
Risk-free interest rate 0.36%   0.35% 0.49%
Expected option term 1 year 4 months 17 days   2 years 6 months 3 years 8 months 12 days
Expected price volatility 59.41%   60.72% 62.59%
Dividend yield          
Weighted average merger date fair value $ 92.73 $ 70.01