Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Goodwill and Other Intangible Assets (Narrative) (Details)

v2.4.0.8
Goodwill and Other Intangible Assets (Narrative) (Details) (USD $)
0 Months Ended 3 Months Ended 9 Months Ended
Oct. 01, 2014
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Impairment charges related to its Digitizer desktop 3D scanner   $ 14,600,000   $ 14,635,000     
Amortization of intangible assets   21,300,000 15,700,000 60,200,000 41,900,000  
Goodwill   1,425,416,000   1,425,416,000   1,195,891,000
Change in fair value due to 1% decrease in growth rate 35,000,000          
Change in fair value due to 1% increase in discount rate $ 54,000,000          
Makerbot [Member]
           
Expected cash flow period 5 years          
Growth rate 3.50%          
Discount rate 14.00%          
Percentage of decrease in growth rate 1.00%          
Percentage of increase in discount rate 1.00%