ACCOUNTING POLICIES - Accounting for Historic and New Markets Tax Credits (Details)	Sep. 30, 2019 property
Real Estate
Number of real estate properties	1,200
Real estate properties that qualify for certain tax credits
Real Estate
Number of real estate properties	10
Development Projects \| Real estate properties that qualify for certain tax credits
Real Estate
Number of real estate properties	1

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.

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