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Basis of Presentation (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Accumulated deficit $ 707,015   $ 707,015   $ 677,772
Total revenue 176,568 $ 159,467 342,437 $ 315,898  
Prepaid expenses and other current assets 25,428   25,428   18,296
Net loss attributable to 3D Systems Corporation (8,862) $ (8,416) (29,819) $ (18,387)  
Other assets (26,217)   (26,217)   (27,136)
Difference Between Revenue Guidance In Effect Before And After Topic 606 | Accounting Standards Update 2014-09          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Accumulated deficit         $ (576)
Net loss attributable to 3D Systems Corporation     (46)    
Calculated Under Revenue Guidance In Effect Before Topic 606 | Accounting Standards Update 2014-09          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Accumulated deficit 477   477    
Total revenue     99    
Prepaid expenses and other current assets 69   69    
Other assets 457   457    
Deferred revenue $ 89   $ 89