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Unsecured Borrowings (Tables)
9 Months Ended
Sep. 30, 2011
Unsecured Borrowings [Abstract] 
Schedule Of Subordinated Note Balances And Related Weighted Average Interest Rate
     Borrowings
Outstanding
     Average
Rate
 

Junior subordinated notes:

     

Capstead Mortgage Trust I

   $ 36,083         8.31

Capstead Mortgage Trust II

     41,238         8.46   

Capstead Mortgage Trust III

     25,774         8.78   
  

 

 

    
   $ 103,095         8.49