COMMITMENTS AND CONTINGENCIES - Development, Expansion and Renovation Projects (Details) - Senior Housing properties [Member] $ in Millions	3 Months Ended
Jul. 31, 2017 USD ($) property
Real Estate Properties [Line Items]
Number of real estate properties classified as held for sale \| property	2
Sales price of pending disposition \| $	$ 36.9

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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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration