Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details)

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Commitments and Contingencies (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Business Acquisition [Line Items]    
Contingent consideration $ (20,000,000) $ (100,000)
Commitments and Contingencies (Textual) [Abstract]    
Accrued expenses 5,100,000  
Other long term liabilities 14,900,000 18,000,000
Recovery of compensatory damages 20,000,000  
Curna Acquisition [Member]
   
Business Acquisition [Line Items]    
Contingent consideration $ (580,000)