RENTAL PROPERTIES (Woodland Park Apartments) (Details)	Sep. 30, 2018 property
RENTAL PROPERTIES
Number of units	913

The number of units in a real estate property owned as of the balance sheet date.

No definition available.

Name:	us-gaap_NumberOfUnitsInRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant