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DISCONTINUED OPERATIONS - Properties Disposed of or Held for Sale (Details) - property	3 Months Ended
	Jul. 31, 2018	Jul. 31, 2017
Discontinued Operations, Held-for-sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties classified as held for sale in discontinued operations	0	0

X

- Definition

Number of real estate properties classified as held for sale in discontinued operations.

+ References

No definition available.

+ Details

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X

- Definition

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.

+ References

No definition available.

+ Details

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: