The commitment period compelling the entity to acquire the interest of the other parties of the joint venture.

No definition available.

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Namespace Prefix:	iret_
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Period Type:	duration

- Definition

The number of consecutive trading days for valuation.

+ References

No definition available.

+ Details

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- Definition

The number of joint ventures with a buy/sell option compelling the entity to acquire the interest of the other parties over a specified term.

+ References

No definition available.

+ Details

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Namespace Prefix:	iret_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The redemption value of UPREIT Units during the period.

+ References

No definition available.

+ Details

Name:	iret_RedemptionValueOfUpreitUnits
Namespace Prefix:	iret_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of limited partners' units to be redeemed in exchange for a number of common shares upon exercise of the redemption option by the limited partners.

+ References

No definition available.

+ Details

Name:	iret_Redemptionbasis
Namespace Prefix:	iret_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Undeferred Taxable Capital Gains

+ References

No definition available.

+ Details

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Namespace Prefix:	iret_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of units in a real estate property owned as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of real estate investments, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; (7) other real estate investments; (8) real estate joint ventures; and (9) unconsolidated real estate and other joint ventures not separately presented.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(d))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

- Details

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

- Details

Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=iret_SubjectToRestrictionsOnTaxableDispositionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_SouthgateMinotNdMember
Namespace Prefix:
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Balance Type:
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COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	12 Months Ended
COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	Apr. 30, 2018 USD ($) property unit joint_venture	Jun. 27, 2018 USD ($)	Apr. 30, 2017 USD ($)
Real Estate Properties [Line Items]
Number of real estate properties \| property	99
Redemption basis	1
Number of consecutive trading days for valuation	10 days
Aggregate redemption value of Units of operating partnership owned by limited partners	$ 74.7		$ 95.1
Number of joint ventures with buy sell options \| joint_venture	1
Subsequent Event [Member]
Real Estate Properties [Line Items]
Undeferred taxable capital gains		$ 30.0
Subject to Restrictions on Taxable Dispositions [Member]
Real Estate Properties [Line Items]
Number of real estate properties \| property	26
Number of apartment homes (approximately) \| unit	4,266
Real estate investment amount of properties (net of accumulated depreciation)	$ 558.6
Southgate - Minot, ND [Member]
Real Estate Properties [Line Items]
Commitment period for joint venture acquisition	4 years