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Commitments And Contingencies (Narrative) (Details)
$ in Thousands
12 Months Ended
Oct. 01, 2018
USD ($)
Sep. 13, 2018
USD ($)
Sep. 05, 2018
USD ($)
Aug. 03, 2018
USD ($)
Mar. 30, 2018
USD ($)
Sep. 28, 2015
USD ($)
Aug. 23, 2013
lawsuit
Dec. 31, 2018
USD ($)
item
Dec. 31, 2017
USD ($)
Other Commitments [Line Items]                  
Supply commitments               $ 54,972 $ 83,305
Total liabilities recorded for earnouts               0 5,115
Redeemable noncontrolling interests               $ 8,872 8,872
Number of stockholder class action lawsuits             2 9  
Percentage of ownership for officer               50.00%  
Provision for arbitration award           $ 11,282      
Alleged actual damages           7,254      
Fees and expenses           2,318      
Prejudgment interest           $ 1,710      
Printer Assemblies And Inventory Items                  
Other Commitments [Line Items]                  
Supply commitments               $ 27,851 57,592
Capital Expenditures And Operating Costs                  
Other Commitments [Line Items]                  
Supply commitments               $ 27,121 $ 25,713
Ronald Barranco And Print3D Corporation V. 3D Systems Corporation, Et. Al.                  
Other Commitments [Line Items]                  
Alleged actual damages     $ 2,182            
Settlement paid $ 101     $ 9,127          
Damages awarded to 3D Systems         $ 523        
Judicial Ruling | Ronald Barranco And Print3D Corporation V. 3D Systems Corporation, Et. Al.                  
Other Commitments [Line Items]                  
Alleged actual damages   $ 2,182