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Note 15 - Fair Value Disclosure of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2013
Fair Value Disclosures [Abstract]  
Fair Value, by Balance Sheet Grouping [Table Text Block]
   

December 31,

 
   

2013

   

2012

 
   

Carrying

Amounts

   

Estimated

Fair Value

   

Carrying

Amounts

   

Estimated

Fair Value

 
                                 

Marketable Securities (1)

  $ 62,766     $ 62,824     $ 36,541     $ 36,825  

Notes Payable (2)

  $ 3,186,047     $ 3,333,614     $ 3,192,127     $ 3,408,632  

Mortgages Payable (3)

  $ 1,035,354     $ 1,083,801     $ 1,003,190     $ 1,068,616  
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
   

Balance at

December 31, 2013

   

Level 1

   

Level 2

   

Level 3

 
                                 

Marketable equity securities

  $ 59,723     $ 59,723     $ -     $ -  
   

Balance at

December 31, 2012

   

Level 1

   

Level 2

   

Level 3

 
                                 

Marketable equity securities

  $ 33,428     $ 33,428     $ -     $ -  
   

Balance at

December 31, 2013

   

Level 1

   

Level 2

   

Level 3

 
                                 

Real estate

  $ 217,529     $ -     $ -     $ 217,529  

Joint venture investments

  $ 59,693     $ -     $ -     $ 59,693  

Other real estate investments

  $ 2,050     $ -     $ -     $ 2,050  

Cost method investment

  $ 4,670     $ -     $ -     $ 4,670  
   

Balance at

December 31, 2012

   

Level 1

   

Level 2

   

Level 3

 
                                 

Real estate

  $ 52,505     $ -     $ -     $ 52,505