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COMMITMENTS AND CONTINGENCIES (Details)
$ in Millions
Jul. 31, 2018
USD ($)
property
unit
Real Estate Properties [Line Items]  
Number of properties 94
Subject to Restrictions on Taxable Dispositions [Member]  
Real Estate Properties [Line Items]  
Number of properties 25
Number of apartment units | unit 4,195
Real estate investment amount of properties (net of accumulated depreciation) | $ $ 548.6