COMMITMENTS AND CONTINGENCIES (Details)	Mar. 31, 2019 property unit
Real Estate Properties [Line Items]
Number of properties	88
Subject to Restrictions on Taxable Dispositions
Real Estate Properties [Line Items]
Number of properties	25
Number of apartment units \| unit	4,372

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration