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Basis of Presentation (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Accumulated deficit $ (718,565)   $ (718,565)   $ (677,772)
Total revenue 164,511 $ 152,907 506,948 $ 468,805  
Prepaid expenses and other current assets 27,028   27,028   18,296
Decrease in net loss attributable to 3D Systems Corporation (11,550) $ (37,670) (41,369) $ (56,057)  
Other assets (26,143)   (26,143)   (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
Decrease in net loss attributable to 3D Systems Corporation     327    
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 (249)   (249)    
Total revenue     327    
Other assets 466   466    
Deferred revenue $ 217   $ 217