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Fair Value Of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2011
Fair Value Of Financial Instruments [Abstract]  
Summary Of Fair Value Information Of Financial Instruments
     December 31,
2011
    December 31,
2010
 

Asset (Liability)

   Book
Value
    Fair
Value
    Book
Value
    Fair
Value
 

Interest and rent receivables

   $ 29,862      $ 22,866      $ 26,176      $ 20,265   

Loans

     239,839        243,272        215,985        209,126   

Debt, net

     (689,849     (688,032     (369,970     (359,910