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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, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Earnings Per Share [Abstract]        
Net loss attributable to 3D Systems Corporation $ (16,843) $ (11,550) $ (65,167) $ (41,369)
Weighted average shares (in shares) 114,053 112,534 113,587 112,095
Net loss per share — basic and diluted (in dollars per share) $ (0.15) $ (0.10) $ (0.57) $ (0.37)