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ORGANIZATION (Summary of Interest Held in Properties) (Details)
Dec. 31, 2017
other_property
mall
Parent  
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]  
Development, Malls (mall) 0
Expansion, Malls (mall) 1
Redevelopment, Malls (mall) 3
Noncontrolling Interests  
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]  
Development, Malls (mall) 0
Development, Other Properties (other property) | other_property 1
Expansion, Malls (mall) 0
Expansion, Other Properties (other property) | other_property 0
Redevelopment, Malls (mall) 1
Redevelopment, Other Properties (other property) | other_property 0