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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]  
Estimate of Future Net Minimum Lease Payments

An estimate of future net minimum lease payments in each of the next five years ending December 31, and the periods thereafter, is as follows:

 

     Amount  

2014

   $ 5,471   

2015

     5,374   

2016

     —     

2017

     —     

2018

     —     

All later years

     —     
  

 

 

 
   $ 10,845