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

Fair Value Measurement (Narrative) (Details)

v3.3.1.900
Fair Value Measurement (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Unrealized gain due to revaluation of the deferred payments in connection with acquisition $ (23,671) $ (26,150) $ 754
Solid Concepts Inc [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Unrealized gain due to revaluation of the deferred payments in connection with acquisition 23,700 7,900  
Realized gain due to revaluation of the deferred payments in connection with acquisition 6,200    
Unrealized gain due to revaluation of the deferred payments in connection with acquisition $ 17,500 7,900  
MakerBot [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Unrealized gain due to revaluation of the deferred payments in connection with acquisition   18,300  
Realized gain due to revaluation of the deferred payments in connection with acquisition   $ 18,200