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Note 12 - Fair Value Measurements (Details) (USD $)
 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Note 12 - Fair Value Measurements (Details) [Line Items]      
Marketable Securities $ 77,123,000 [1]   $ 62,766,000 [1]
Asset Impairment Charges 107,034,000 167,153,000  
Cost-method Investments, Other than Temporary Impairment 4,800,000 10,000,000  
Other Joint Venture Programs [Member]
      
Note 12 - Fair Value Measurements (Details) [Line Items]      
Equity Method Investment, Other than Temporary Impairment   1,000,000  
Preferred Equity Investments [Member]
      
Note 12 - Fair Value Measurements (Details) [Line Items]      
Equity Method Investment, Other than Temporary Impairment   3,200,000  
Cost-method Investments [Member]
      
Note 12 - Fair Value Measurements (Details) [Line Items]      
Fair Value Inputs, Cap Rate 6.00%    
Fair Value Inputs, Discount Rate 9.10%    
Fair Value, Inputs, Level 1 [Member]
      
Note 12 - Fair Value Measurements (Details) [Line Items]      
Marketable Securities 74.5   59,700,000
Impairment of Real Estate 80,500,000    
Fair Value, Inputs, Level 3 [Member]
      
Note 12 - Fair Value Measurements (Details) [Line Items]      
Marketable Securities 2,800,000   3,100,000
Impairment of Real Estate 21,700,000    
Discontinued Operations [Member]
      
Note 12 - Fair Value Measurements (Details) [Line Items]      
Asset Impairment Charges 61,300,000 83,300,000  
Minimum [Member]
      
Note 12 - Fair Value Measurements (Details) [Line Items]      
Fair Value Inputs, Cap Rate 5.00%    
Fair Value Inputs, Discount Rate 6.00%    
Maximum [Member]
      
Note 12 - Fair Value Measurements (Details) [Line Items]      
Fair Value Inputs, Cap Rate 15.00%    
Fair Value Inputs, Discount Rate 16.00%    
Fair Value, Estimate Not Practicable, Carrying (Reported) Amount [Member]
      
Note 12 - Fair Value Measurements (Details) [Line Items]      
Impairment of Real Estate $ 102,200,000 $ 153,000,000  
[1] As of September 30, 2014 and December 31, 2013, the Company determined that $74.5 million and $59.7 million, respectively, of the Marketable securities estimated fair value were classified within Level 1 of the fair value hierarchy and the remaining $2.8 million and $3.1 million, respectively, were classified within Level 3 of the fair value hierarchy.