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Net Loss Per Share (Schedule Of Net Loss Per Share Reconciliation) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Net Loss Per Share [Abstract]        
Net loss attributable to 3D Systems Corporation $ (37,670) $ (21,213) $ (56,057) $ (43,649)
Weighted average shares 111,697 111,008 111,467 111,194
Net loss per share — basic and diluted $ (0.34) $ (0.19) $ (0.50) $ (0.39)