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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
Mar. 31, 2019
Mar. 31, 2018
Earnings Per Share [Abstract]    
Net loss attributable to 3D Systems Corporation $ (24,394) $ (20,955)
Weighted average shares (in shares) 113,267 111,819
Net loss per share — basic and diluted (in dollars per share) $ (0.22) $ (0.19)