Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets (Details Textual)

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Goodwill and Other Intangible Assets (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Amortization of Intangible Assets $ 8,100,000 $ 3,800,000 $ 2,600,000
Weighted Average Remaining Amortization Period 9 years 4 months 24 days 6 years 8 months 12 days  
Objet Ltd [Member]
     
Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net 1,341,000,000    
Goodwill 797,063,000    
Solidscape, Inc [Member]
     
Goodwill 24,616,000 24,600,000  
Business Acquisition, Cost of Acquired Entity, Cash Paid   $ 39,100,000