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

Acquisitions and Other Significant Business Activities (Narrative) (Details)

v3.7.0.1
Acquisitions and Other Significant Business Activities (Narrative) (Details)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Jul. 14, 2014
USD ($)
Jul. 14, 2014
USD ($)
shares
Dec. 31, 2016
USD ($)
Sep. 30, 2015
USD ($)
shares
Sep. 30, 2016
USD ($)
shares
Sep. 30, 2015
USD ($)
shares
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Jun. 30, 2016
Jul. 02, 2015
Apr. 30, 2015
ft²
Sep. 22, 2014
Aug. 01, 2014
Business Acquisition [Line Items]                            
Purchase of property and equipment             $ 45,125 $ 84,299 $ 60,497          
Change in fair value of obligations in connection with acquisitions             (872) (23,671) (26,150)          
Fair value of shares issued and stock options                 117,845          
Area of new building space under construction | ft²                       283,900    
Area of additional building rights | ft²                       235,400    
Restructuring charges             6,600 26,200            
Repayments of Short-term Debt             175,000            
Rehovot Property [Member]                            
Business Acquisition [Line Items]                            
Purchase of property and equipment             $ 58,400              
Bank Loan [Member]                            
Business Acquisition [Line Items]                            
Proceeds from secured debt     $ 26,000                      
Maturity date     Dec. 31, 2023                      
Interest rate     3.35%       3.35%              
Credit Line [Member]                            
Business Acquisition [Line Items]                            
Proceeds from secured debt     $ 24,000                      
Workforce reductions [Member]                            
Business Acquisition [Line Items]                            
Restructuring charges               10,400            
Selling, General and Administrative Expenses [Member]                            
Business Acquisition [Line Items]                            
Restructuring charges               14,800            
Research and Development, Net [Member]                            
Business Acquisition [Line Items]                            
Restructuring charges               1,500            
Cost Of Sales [Member]                            
Business Acquisition [Line Items]                            
Restructuring charges               9,900            
Revolving Credit Facility [Member]                            
Business Acquisition [Line Items]                            
Amount outstanding       $ 250,000   $ 250,000                
Maturity term       5 years                    
Repayments of Short-term Debt       $ 175,000                    
Additional financial expense on termination of short-term debt       $ 2,700                    
Solid Concepts Inc [Member]                            
Business Acquisition [Line Items]                            
Ownership percentage 100.00% 100.00%                        
Change in fair value of obligations in connection with acquisitions             $ 900 23,700 7,900          
Acquisition related costs   $ 2,900                        
Potential retention related payments   77,000         3,500              
Retention related payments             $ 900 100 $ 13,100          
Other intangible assets $ 38,320 $ 38,320                        
Weighted Average Life - Years   6 years 7 months 6 days                        
Consideration issued for acquisition $ 185,400                          
Stock Issued During Period, Shares, Acquisitions | shares   978,601                        
Fair value of shares issued and stock options   $ 97,869                        
Shares issued to settle the first annual installment of the deferred payments, share | shares       118,789   118,789                
Shares issued to settle the first annual installment of the deferred payments           $ 4,100                
Cash paid to settle the first annual installment of the deferred payments           $ 900                
Shares issued to settle the second annual installment of the deferred payments, share | shares         152,633                  
Shares issued to settle the second annual installment of the deferred payments         $ 3,100                  
Cash paid to settle the second annual installment of the deferred payments         $ 400                  
Solid Concepts Inc [Member] | Retention Related and Other Payments [Member]                            
Business Acquisition [Line Items]                            
Cash paid for acquisitions   $ 19,600                        
Solid Concepts Inc [Member] | Customer relationships [Member]                            
Business Acquisition [Line Items]                            
Weighted Average Life - Years             6 years              
Impairment charges             $ 9,900 12,400            
Solid Concepts Inc [Member] | Level 3 [Member]                            
Business Acquisition [Line Items]                            
Fair value of the remaining deferred payments     2,600       2,600              
Undiscounted amount of the remaining deferred payments     $ 2,800       $ 2,800              
Increase percentage in share price whose effect on fair value of deferred payments             10.00%              
Increase in fair value of deferred payments due to increase of share price             $ 300              
Decrease percentage in share price whose effect on fair value of deferred payments liability             10.00%              
Increase in fair value of deferred payments liability due to decrease of share price             $ 200              
Solid Concepts Inc [Member] | Transaction One [Member]                            
Business Acquisition [Line Items]                            
Shares issued to settle the first annual installment of the deferred payments, share | shares       117,611   117,611                
Shares issued to settle the first annual installment of the deferred payments           $ 4,100                
Cash paid to settle the first annual installment of the deferred payments           $ 2,800                
Shares issued to settle the second annual installment of the deferred payments, share | shares         103,112                  
Shares issued to settle the second annual installment of the deferred payments         $ 2,100                  
Cash paid to settle the second annual installment of the deferred payments         $ 1,900                  
Rapid Technologies GmbH ("RTC") [Member]                            
Business Acquisition [Line Items]                            
Ownership percentage                     100.00%      
MakerBot [Member] | Facility Closing [Member]                            
Business Acquisition [Line Items]                            
Restructuring charges               $ 15,800            
Third party entity [Member] | Minimum [Member]                            
Business Acquisition [Line Items]                            
Ownership percentage                   10.00%        
Third party entity [Member] | Maximum [Member]                            
Business Acquisition [Line Items]                            
Ownership percentage                   40.00%        
GradCAD                            
Business Acquisition [Line Items]                            
Ownership percentage                         100.00%  
Harvest Technologies Inc [Member]                            
Business Acquisition [Line Items]                            
Ownership percentage                           100.00%