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Note 5 - Other Real Estate Investments (Details) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Note 5 - Other Real Estate Investments (Details) [Line Items]      
Equity Method Investments $ 1,198,424,000   $ 1,257,010,000
Income (Loss) from Equity Method Investments 53,261,000 24,111,000  
Preferred Equity Investments [Member] | Leased Properties [Member]
     
Note 5 - Other Real Estate Investments (Details) [Line Items]      
Number of Real Estate Properties 390    
Preferred Equity Investments [Member]
     
Note 5 - Other Real Estate Investments (Details) [Line Items]      
Equity Method Investments 234,300,000    
Number of Real Estate Properties 478    
Income (Loss) from Equity Method Investments 7,800,000 9,900,000  
Equity Method Investment, Realized Gain (Loss) on Disposal $ 2,200,000 $ 4,300,000  
Number of Capital Transactions 1 1