Related Party Transactions (Tables)
 6 Months Ended
Jun. 30, 2012
Related Party Transactions [Abstract]  
Summary of transactions with sponsors and individual owners who retain an interest
                                 
    Three Months Ended
June 30,		     Six Months Ended
June 30,		  
    Individual           Individual        
    Owners     Sponsors     Owners     Sponsors  

2012 (unaudited)

                                

Interest expense on mezzanine debt

   $ —       $ —       $ 195     $ 812  

Financing fees

     —         —         3       12  

Consulting and advisory fee expense

     —         —         563       888  

2011

                                

Interest expense on mezzanine debt

   $ 192     $ 802     $ 383     $ 1,596  

Consulting and advisory fee expense

     112       197       225       392