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, 2020	Mar. 31, 2019
Numerator for basic and diluted net loss per share:
Net loss attributable to 3D Systems Corporation	$ (18,924)	$ (24,394)
Denominator for basic and diluted net loss per share:
Weighted average shares (in shares)	114,590	113,267
Net loss per share — basic and diluted (in dollars per share)	$ (0.17)	$ (0.22)