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Commitments and Contingencies (Tables)
 6 Months Ended
Jun. 30, 2011
Commitments and Contingencies (Tables) [Abstract]  
Future minimum lease payments due under operating and capital leases
                 
    Operating Leases     Capital Leases(1)  
2011
  $ 2,662     $ 3,803
2012
    5,322       7,622
2013
    5,333       73,003
2014
    5,353       660
2015
    5,100       8,425
Thereafter
    196,918       —  
 
           
Totals
  $ 220,688     $ 93,513
 
           
 
(1)   Related to gross assets of $181,254,000 recorded in real property.