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

X

- 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

X

- 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

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

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

X

- Details

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