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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator for basic and diluted net loss per share:
Net loss attributable to 3D Systems Corporation		$ (16,843)		$ (65,167)
Denominator for basic and diluted net loss per share:
Weighted average shares (in shares)	118,527	114,053	116,216	113,587
Net loss per share — basic and diluted (in dollars per share)	$ (0.61)	$ (0.15)	$ (1.12)	$ (0.57)