Annual report pursuant to Section 13 and 15(d)

Fair Value Measurement (Details Textual)

v2.4.0.6
Fair Value Measurement (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Fair Value Measurement (Textual) [Abstract]    
Contingent consideration $ 20,000,000 $ 100,000
Increase in discount rates related to consideration 1.00%  
Change in contingent consideration on discount rates increase 200,000  
Decrease of estimated future sales 10.00%  
Accrued expenses 5,100,000  
Other long term liabilities 14,900,000 18,000,000
Maximum [Member]
   
Fair Value Measurement (Textual) [Abstract]    
Discount rates related to consideration 27.00%  
Minimum [Member]
   
Fair Value Measurement (Textual) [Abstract]    
Discount rates related to consideration 13.00%  
US Treasury Securities [Member]
   
Fair Value Measurement (Textual) [Abstract]    
Accrued expenses 14,900,000  
Other long term liabilities $ 5,100,000 $ 18,000,000