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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

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- Definition Number of real estate properties classified as held for sale in discontinued operations. + References No definition available. + Details
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Namespace Prefix: | iret_
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Balance Type: | na
Period Type: | duration

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- 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

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- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsHeldforsaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |