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MORTGAGES PAYABLE AND CONSTRUCTION DEBT, LINE OF CREDIT (Details) - Secured Debt [Member] | Apr. 30, 2015 Property
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Line of Credit Facility [Line Items] |
Number of properties securing line of credit | 15
Number of properties not encumbered | 48

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- Definition The number of properties which are not used as security for the line of credit. + References No definition available. + Details
Name: | iret_NumberOfPropertiesNotSecuringLineOfCredit
Namespace Prefix: | iret_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of properties used as security under the line of credit. + References No definition available. + Details
Name: | iret_NumberOfPropertiesSecuringLineOfCredit
Namespace Prefix: | iret_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

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- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |