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Commitments and Contingencies (Narrative) (Details) $ in Thousands							3 Months Ended	12 Months Ended
	Sep. 28, 2018 USD ($)	Sep. 13, 2018 USD ($)	Aug. 03, 2018 USD ($)	Mar. 30, 2018 USD ($)	Sep. 28, 2015 USD ($)	Aug. 23, 2013 lawsuit	Mar. 31, 2019 USD ($) lawsuit	Dec. 31, 2018 USD ($)
Loss Contingencies [Line Items]
Redeemable noncontrolling interests							$ 8,872	$ 8,872
Number of stockholder class action lawsuits | lawsuit							9
Ronald Barranco and Print3D Corporation v. 3D Systems Corporation, et. al.
Loss Contingencies [Line Items]
Number of stockholder class action lawsuits | lawsuit						2
Percentage of ownership for officer (percent)								50.00%
Provision for arbitration award					$ 11,282
Amount awarded	$ 2,182				7,254
Fees and expenses					2,318
Prejudgment interest					$ 1,710
Settlement paid	$ 101		$ 9,127
Damages awarded to 3D Systems				$ 523
Judicial Ruling | Ronald Barranco and Print3D Corporation v. 3D Systems Corporation, et. al.
Loss Contingencies [Line Items]
Amount awarded		$ 2,182

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