| 
           Fair Value Measurements (Narrative) (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        3 Months Ended | |
|---|---|---|
| 
           Mar. 31, 2015 
         | 
        
           Mar. 31, 2014 
         | 
      |
| 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 | $ (13,256)ssys_ChangeInFairValueOfObligationsInConnectionWithAcquisitions | $ (7,495)ssys_ChangeInFairValueOfObligationsInConnectionWithAcquisitions | 
| 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 | 
$ 13,300ssys_ChangeInFairValueOfObligationsInConnectionWithAcquisitions / us-gaap_BusinessAcquisitionAxis = ssys_SolidConceptsIncMember  | 
        |
| X | ||||||||||
| 
             
- Definition 
          Represents the amount of change in fair value of obligations in connection with acquisitions. No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Details 
          
  | 
        
| X | ||||||||||
| 
             
- Details 
          
  |