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Earnings Per Share (Schedule Of Earnings Per Share Reconciliation) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Nov. 30, 2011
Senior Convertible Notes Due December 15, 2016 [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]          
Net income attributable to 3D Systems - numerator for basic net earnings per share $ 3,084 $ 17,657 $ 10,086 $ 32,883  
Numerator for dilutive earnings per share 3,084 17,657 10,086 32,883  
Weighted average shares - denominator for basic net earnings per share 110,737 102,437 106,923 96,874  
Denominator for dilutive net earnings per share 110,737 102,437 106,923 96,874  
Earnings per share, basic and diluted $ 0.03 $ 0.17 $ 0.09 $ 0.34  
Interest expense excluded from diluted earnings per share calculation   $ 243 [1] $ 362 [1] $ 1,751 [1]  
5.5% Convertible notes shares excluded from diluted earnings per share calculation   876 [1] 584 [1] 2,060 [1]  
Interest rate         5.50%
[1] Average outstanding diluted earnings per share calculation excludes shares that may be issued upon conversion of the outstanding senior convertible notes since the effect of their inclusion would have been anti-dilutive.