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

Acquisitions and Other Business Activities (Schedule of Consideration Transferred in Merger) (Details)

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Acquisitions and Other Business Activities (Schedule of Consideration Transferred in Merger) (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Aug. 15, 2013
Apr. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Business Acquisition [Line Items]          
Issuance of ordinary shares to MakerBot stockholders     $ 180,620 $ 481,487
Tax withholding and other payments on behalf of MakerBot stockholders     $ 10,414 157,559 12,163
Exchange of MakerBot stock options for the Company options       $ 117,845 $ 453,217
Total consideration   $ 39,000      
MakerBot [Member]          
Business Acquisition [Line Items]          
Issuance of ordinary shares to MakerBot stockholders $ 446,019        
Tax withholding and other payments on behalf of MakerBot stockholders 12,163        
Exchange of MakerBot stock options for the Company options 7,198        
Earn-out at estimated fair value 28,270        
Total consideration $ 493,650