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Note 5 - Other Real Estate Investments (Details) (USD $)
9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Note 5 - Other Real Estate Investments (Details) [Line Items]      
Equity Method Investments $ 1,087,425,000   $ 1,257,010,000
Income (Loss) from Equity Method Investments 150,073,000 179,791,000  
Preferred Equity Investments [Member] | Leased Properties [Member]
     
Note 5 - Other Real Estate Investments (Details) [Line Items]      
Number of Real Estate Properties 385    
Preferred Equity Investments [Member]
     
Note 5 - Other Real Estate Investments (Details) [Line Items]      
Equity Method Investments 232,300,000    
Number of Real Estate Properties 446    
Income (Loss) from Equity Method Investments 17,500,000 37,900,000  
Equity Method Investment, Realized Gain (Loss) on Disposal $ 3,700,000 $ 20,300,000  
Number of Capital Transactions 3 9