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Fair Value Of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2011
Fair Value Of Financial Instruments [Abstract] 
Summarizes Fair Value Information Of Financial Instruments
     September 30,
2011
    December 31,
2010
 

Asset (Liability)

   Book
Value
    Fair
Value
    Book
Value
    Fair
Value
 

Interest and rent receivables

   $ 28,822      $ 22,418      $ 26,176      $ 20,265   

Loans

     221,131        223,556        215,985        209,126   

Debt, net

     (649,013     (597,802     (369,970     (359,910