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Basis Of Presentation (Details)
3 Months Ended 6 Months Ended
Mar. 31, 2013
Jun. 30, 2013
Basis Of Presentation [Abstract]    
Description of stock split The Company's Board of Directors approved a three-for-two stock split, effected in the form of a 50% stock dividend, which waspaid on February 22, 2013 to stockholders of record at the close of business on February 15, 2013. The Company's stockholders received one additional share of common stock for every two shares of common stock owned. This did not change the proportionate interest that a stockholder maintained in the Company. In lieu of fractional shares, shareholders received a cash payment based on the closing market price of DDD stock on the record date. All share and per share amounts set forth in this report, including earnings per share and the weighted average number of shares outstanding for basic and diluted earnings per share, for each respective period, have been adjusted to reflect the three-for-two stock split.  
Stock split ratio 1.5  
Percentage rate of effected dividend 50.00%  
Dividend paid, date   Feb. 22, 2013
Stockholders as of record, date   Feb. 15, 2013