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Fair Value (Tables)
6 Months Ended
Jun. 30, 2013
Fair Value Disclosures [Abstract]  
Fair Value of Contingently Convertible Series E Units Liability

The following table sets forth the fair value of the contingently convertible series E units liability as of June 30, 2013 (in thousands):

 

            June 30, 2013  

Description

   Total      Quoted Prices in
Active Markets
for Identical
Assets
(Level 1)
     Significant
Other
Observable
Inputs
(Level 2)
     Significant
Unobservable
Inputs
(Level 3)
 

Contingently convertible Series E units liability

   $ 64,881       $ —         $ —         $ 64,881