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

Income Taxes (Details)

v3.3.0.814
Income Taxes (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Jun. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Income Taxes [Abstract]          
Effective Income Tax Rate, Continuing Operations 3.60%   41.10% 4.50% 53.70%
Change in Fair Value of Obligations in Connection With Acquisitions $ (3,022)   $ 5,578 $ (22,958) $ (1,289)
Goodwill impairment 695,458   845,858
Reduction in income tax expense associated with amortization of intangible assets   $ 1,700      
Increase in income tax expense associated with amortization of intangible assets   $ 3,400      
MakerBot [Member]          
Income Tax [Line Items]          
Reversal of deferred tax liabilities 63,200     80,400  
Valuation allowance against deferred tax assets $ 49,400     $ 66,600