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Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended 12 Months Ended
Jun. 30, 2011
Mar. 31, 2011
Jun. 30, 2011
Dec. 31, 2012
property
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2010
RioCan Real Estate Investment Trust [Member]
Oct. 09, 2012
RioCan Real Estate Investment Trust [Member]
Oct. 09, 2009
RioCan Real Estate Investment Trust [Member]
property
Dec. 31, 2012
Homburg Joint Venture [Member]
property
Dec. 31, 2012
40% General Partnership Interest [Member]
property
Dec. 31, 2012
Variable Interest Entity, Primary Beneficiary [Member]
60% Ownership Interest [Member]
item
Dec. 31, 2011
Variable Interest Entity, Primary Beneficiary [Member]
60% Ownership Interest [Member]
Dec. 31, 2012
Minimum [Member]
Dec. 31, 2012
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]                              
Ownership percentage               20.00%   20.00% 40.00% 60.00%      
Number of properties       67         22 9 2        
Number of joint ventures                       3      
VIE real estate owned carrying value                       $ 141,300,000      
VIE mortgage payable                       60,400,000      
VIE real estate owned as line of credit facility collateral                         18,900,000    
Percentage of VIE's results of operations included in net income (loss) attributable to common shareholders                       100.00%      
Revenues       140,583,000 134,828,000 130,998,000 3,300,000                
Limited partner's interest in unconsolidated joint venture   76.00% 85.00%                        
Investments in and advances to unconsolidated joint ventures 745,000       4,300,000 51,441,000                  
Payments to exit joint venture       838,000                      
Depreciation expense       41,189,000 [1] 39,912,000 [1] 32,138,000 [1]                  
Real estate investments useful life                           3 years 40 years
Depreciation       41,200,000 39,900,000 32,100,000                  
Cost of acquired properties       100,000 900,000 0                  
Potential development projects costs write off       0 500,000 1,300,000                  
Investment advisor fees             2,700,000                
Cash at consolidated joint ventures       1,600,000 7,700,000                    
Allowance for doubtful accounts receivable       5,400,000 5,800,000                    
Provision for doubtful accounts included in operating, maintenance and management expenses       $ 1,900,000 $ 1,900,000 $ 2,100,000                  
Remaining number of shares provided for award to key employees       2,000,000                      
Maximum number of shares may be issued under the plan       4,500,000                      
Maximum number of shares to be granted per year to a participant       500,000                      
[1] Restated to reflect the reclassifications of properties to "real estate held for sale/conveyance" during 2012.