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Note 15 - Noncontrolling Interests (Detail) (USD $)
 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2007
Dec. 31, 2012
Shopping Centers [Member]
Dec. 31, 2012
Remaining [Member]
Dec. 31, 2011
Remaining [Member]
Dec. 31, 2012
Discount [Member]
Dec. 31, 2006
Fair Market Value Adjustments [Member]
Convertible Units [Member]
Dec. 31, 2012
Fair Market Value Adjustments [Member]
Dec. 31, 2012
Non-convertible Units [Member]
Puerto Rico [Member]
Dec. 31, 2012
Convertible Units [Member]
Puerto Rico [Member]
Dec. 31, 2006
Convertible Units [Member]
Dec. 31, 2012
Premiums [Member]
Puerto Rico [Member]
Dec. 31, 2012
Fair Market Value Adjustments [Member]
Puerto Rico [Member]
Dec. 31, 2012
Redeemable Units [Member]
Dec. 31, 2011
Redeemable Units [Member]
Dec. 31, 2012
Fixed Rate Redeemable Units [Member]
Dec. 31, 2012
Class A Units [Member]
Dec. 31, 2007
Class B Units [Member]
Dec. 31, 2012
Puerto Rico [Member]
Number of Real Estate Properties 28       2                               7
Noncontrolling Interest, Increase from Equity Issuance or Sale of Parent Equity Interest $ 41,600,000 $ 1,045,000 $ 2,721,000         $ 300,000 $ 300,000 $ 3,800,000 $ 158,600,000 $ 45,800,000 $ 5,300,000 $ 13,500,000 $ 15,100,000 $ 24,200,000   $ 14,000,000     $ 233,000,000
Redeemable Noncontrolling Interest, Equity, Carrying Amount 81,076,000 95,074,000 95,060,000     110,800,000 110,500,000                 26,400,000 40,400,000        
Noncash or Part Noncash Acquisition, Debt Assumed 23,400,000                                        
Noncontrolling Interest, Units Redeemed (in Shares)                                     13,963 30,000  
Noncontrolling Interest, Cumulative Par Value       $ 1,100,000                                  
Noncontrolling Interest, Units (in Shares)                         138,015                
Number of Years                         1