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Organization and Principles of Consolidation (Details)
9 Months Ended
Sep. 30, 2016
retail_shopping_center
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]  
Document Period End Date Sep. 30, 2016
Operations commenced date Dec. 31, 1993
Wholly Owned Properties [Member]  
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]  
Number of real estate properties 197
Unconsolidated Properties [Member]  
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]  
Number of real estate properties 110
Partially Owned Properties [Member]  
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]  
Number of real estate properties 121
Consolidated Properties [Member]  
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]  
Number of real estate properties 11
Parent Company [Member]  
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]  
Ownership percentage of outstanding common partnership units 99.90%