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Significant Accounting Policies (Narrative) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 01, 2019
Significant Accounting Policies [Line Items]                                
Impairment charges on minority investments                         $ 927,000 $ 1,373,000    
Carrying amount of cost method investments $ 8,327,000       $ 8,483,000               8,327,000 8,483,000    
Finite lives impairment charge                         0 0    
Payable to owners of redeemable noncontrolling interests 10,000,000       0               10,000,000 0    
Advertising costs                         13,732,000 13,562,000 $ 13,683,000  
Accumulated deficit (793,709,000)       (722,701,000)               (793,709,000) (722,701,000)    
Consolidated revenue   $ 155,272,000 $ 157,272,000 $ 151,980,000 180,712,000 $ 164,511,000 $ 176,568,000 $ 165,869,000 $ 177,264,000 $ 152,907,000 $ 159,467,000 $ 156,431,000        
Net loss attributable to 3D Systems Corporation (4,714,000) $ (16,843,000) $ (23,929,000) $ (24,394,000) (4,136,000) $ (11,550,000) $ (8,862,000) $ (20,957,000) $ (10,134,000) $ (37,670,000) $ (8,416,000) $ (9,971,000) (69,880,000) (45,505,000) $ (66,191,000)  
Other assets 27,390,000       $ 26,814,000               27,390,000 $ 26,814,000    
Operating leases, ROU assets 28,571,000                       28,571,000      
Operating leases, liabilities $ 34,066,000                       $ 34,066,000      
Accounting Standards Update 2016-02                                
Significant Accounting Policies [Line Items]                                
Operating leases, ROU assets                               $ 38,415,000
Operating leases, liabilities                               $ 38,415,000