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Noncontrolling Interests (Details)
3 Months Ended
Mar. 31, 2015
Phenix Systems [Member]  
Business Acquisition [Line Items]  
Business acquisition, ownership percentage 95.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= ddd_PhenixSystemsMember
Date of acquisition Jul. 15, 2013
Robtec [Member]  
Business Acquisition [Line Items]  
Business acquisition, ownership percentage 70.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= ddd_RobtecMember
Date of acquisition Nov. 25, 2014