Addition to intangible liabilities during the period.

No definition available.

Name:	iret_AdditionToIntangibleLiabilities
Namespace Prefix:	iret_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

Name:	iret_BasisOfPresentationAbstract
Namespace Prefix:	iret_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The distribution made by the entity as return of capital.

+ References

No definition available.

+ Details

Name:	iret_DistributionMadeAsReturnOfCapital
Namespace Prefix:	iret_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Distribution made by the entity under capital gain .

+ References

No definition available.

+ Details

Name:	iret_DistributionMadeUnderCapitalGain
Namespace Prefix:	iret_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Distribution made by the entity under federal income tax.

+ References

No definition available.

+ Details

Name:	iret_DistributionMadeUnderFederalIncomeTax
Namespace Prefix:	iret_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The dividend distributed (in percentage) made by the entity during the year.

+ References

No definition available.

+ Details

Name:	iret_DividendDistributionPercentage
Namespace Prefix:	iret_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	iret_IdentifiedIntangibleAssetsAndIntangibleLiabilitiesAndGoodwillAbstract
Namespace Prefix:	iret_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Impairment of real estate continuing and discontinued operations.

+ References

No definition available.

+ Details

Name:	iret_ImpairmentOfRealEstateContinuingAndDiscontinuedOperations
Namespace Prefix:	iret_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The entity's ownership interest in the operating partnership.

+ References

No definition available.

+ Details

Name:	iret_InterestInOperatingPartnership
Namespace Prefix:	iret_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The minimum dividend distribution percentage under section 856-860 of Internal Revenue Code of 1986, as amended.

+ References

No definition available.

+ Details

Name:	iret_MinimumDividendDistributionPercentage
Namespace Prefix:	iret_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of impaired properties for the fiscal year.

+ References

No definition available.

+ Details

Name:	iret_NumberOfImpairedProperties
Namespace Prefix:	iret_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of real estate properties classified as held for sale.

+ References

No definition available.

+ Details

Name:	iret_NumberOfRealEstatePropertiesClassifiedAsHeldForSale
Namespace Prefix:	iret_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of real estate properties classified as discontinued operations.

+ References

No definition available.

+ Details

Name:	iret_NumberOfRealEstatePropertiesClassifiedDiscontinuedOperations
Namespace Prefix:	iret_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	iret_NumberOfRealEstatePropertiesDisposed
Namespace Prefix:	iret_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The minimum number of units required for a limited partner to exercise the redemption, unless such limited partner holds less than this minimum, in which case the minimum number of units is equal to the number of units held by such limited partner.

+ References

No definition available.

+ Details

Name:	iret_NumberOfUnitsToRedeemMinimum
Namespace Prefix:	iret_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of year after the date of acquisition related to adjustment of real estate preliminary allocations of the purchase price.

+ References

No definition available.

+ Details

Name:	iret_NumberOfYearAfterDateOfAcquisitionRelatedToAdjustmentOfRealEstatePreliminaryAllocationsOfPurchasePrice
Namespace Prefix:	iret_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The entity's ownership interest in the general partnership included in operating partnership interest.

+ References

No definition available.

+ Details

Name:	iret_PercentageOfGeneralInterestPartnership
Namespace Prefix:	iret_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The minimum period for which some limited partners have contractually agreed to hold the beneficial interest.

+ References

No definition available.

+ Details

Name:	iret_PeriodToHoldBeneficialInterestMinimum
Namespace Prefix:	iret_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum number of redemptions by a limited partner that may occur in a calendar year.

+ References

No definition available.

+ Details

Name:	iret_RedemptionsByLimitedPartnerMaximum
Namespace Prefix:	iret_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.14)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

+ Details

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

+ References

No definition available.

+ Details

Name:	us-gaap_FinitelivedIntangibleAssetsAcquired1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.13)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Useful life on which depreciation was computed for entities with a substantial portion of business acquiring and holding investment real estate, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section S99
-Paragraph 6
-Subparagraph (SX 210.5-04.(c) Schedule III)
-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 970
-SubTopic 360
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-28)
-URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024

+ Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingAndBuildingImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=iret_RenovationsAndImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=us-gaap_ResidentialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=iret_MultiFamilyResidentialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_StCloudMinnesotaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=iret_UnimprovedLandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_GrandChuteWisconsinUnimprovedLandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_RiverFallsWisconsinMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_EaganMinnesotaUnimprovedLandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_WestonWisconsinUnimprovedLandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=iret_CommercialHealthcareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=iret_CommercialIndustrialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_StLouisParkMinnesotaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_CliveIowaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_RosevilleMinnesotaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=iret_CommercialOfficeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_GoldenValleyMinnesotaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_BloomingtonMinnesotaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_EdinaMinnesotaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=us-gaap_RetailSiteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_KalispellMontanaRetailMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_AnokaMinnesotaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=iret_OfficePropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_EdenPrairieMinnesotaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_MinneapolisMinnesotaOfficePropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_BoiseIdahoOfficePropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=iret_MedicalPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=iret_SartellMinnesotaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_SegmentDiscontinuedOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=iret_SeniorHousingPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Real Estate Properties (Details)	3 Months Ended		12 Months Ended
	Apr. 30, 2016 USD ($) property shares	Jul. 31, 2015 property	Apr. 30, 2016 USD ($) property item shares	Dec. 31, 2015	Apr. 30, 2015 USD ($) property	Dec. 31, 2014	Apr. 30, 2014 USD ($) property
BASIS OF PRESENTATION [Abstract]
Interest in operating partnership (in hundredths)	88.10%		88.10%		89.90%
Percentage of general interest partnership (in hundredths)	100.00%		100.00%		100.00%
Redemption basis			1:1
Redemptions by limited partner, maximum \| item			2
Number of units to redeem, minimum (in units) \| shares	1,000		1,000
Period to hold the beneficial interest, minimum			1 year
REAL ESTATE INVESTMENTS [Abstract]
Number of year after date of acquisition related to adjustment of real estate preliminary allocations of purchase price			1 year
Impairment of real estate investments			$ 5,983,000		$ 6,105,000		$ 44,426,000
Number of impaired properties \| property							15
IDENTIFIED INTANGIBLE ASSETS AND LIABILITIES AND GOODWILL [Abstract]
New intangible assets			2,200,000		416,000
Addition to intangible liabilities			$ 101,000		$ 0
Weighted average lives of intangible assets acquired			8 months 12 days		6 months
Goodwill book value	$ 1,680,000		$ 1,680,000		$ 1,718,000
Recognized impairment goodwill			0		0
Goodwill recognized					852,000
Goodwill derecognized			196,000		40,000		$ 7,000
PROPERTY AND EQUIPMENT [Abstract]
Property and equipment cost	2,100,000		2,100,000		2,400,000
Accumulated depreciation	$ 1,058,000		$ 1,058,000		$ 1,374,000
INCOME TAXES [Abstract]
Minimum dividend distribution percentage (in hundredths)			90.00%
Dividend distribution percentage (in hundredths)			90.00%		90.00%		90.00%
Distribution of federal income tax (in hundredths)				36.28%		25.74%
Distribution of capital gain (in hundredths)				11.99%		23.09%
Distribution made as return of capital (in hundredths)				51.73%		51.17%
Buildings and Improvements [Member] \| Minimum [Member]
REAL ESTATE INVESTMENTS [Abstract]
Estimated useful life of assets (in years)			20 years
Buildings and Improvements [Member] \| Maximum [Member]
REAL ESTATE INVESTMENTS [Abstract]
Estimated useful life of assets (in years)			40 years
Furniture, Fixtures and Equipment [Member] \| Minimum [Member]
REAL ESTATE INVESTMENTS [Abstract]
Estimated useful life of assets (in years)			5 years
Furniture, Fixtures and Equipment [Member] \| Maximum [Member]
REAL ESTATE INVESTMENTS [Abstract]
Estimated useful life of assets (in years)			12 years
Renovations and Improvements [Member] \| Minimum [Member]
REAL ESTATE INVESTMENTS [Abstract]
Estimated useful life of assets (in years)			5 years
Renovations and Improvements [Member] \| Maximum [Member]
REAL ESTATE INVESTMENTS [Abstract]
Estimated useful life of assets (in years)			10 years
Multi-family Residential Properties [Member]
IDENTIFIED INTANGIBLE ASSETS AND LIABILITIES AND GOODWILL [Abstract]
Number of real estate properties disposed \| property					1
Multi-Family Residential [Member]
REAL ESTATE INVESTMENTS [Abstract]
Number of impaired properties \| property			8
Multi-Family Residential [Member] \| St Cloud Minnesota Member
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments			$ 1,900,000
Number of impaired properties \| property			8
Unimproved Land [Member]
REAL ESTATE INVESTMENTS [Abstract]
Number of impaired properties \| property			2		2
Unimproved Land [Member] \| Grand Chute, Wisconsin, Unimproved Land [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments			$ 1,600,000
Unimproved Land [Member] \| River Falls Wisconsin Member
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments			$ 162,000
Unimproved Land [Member] \| Eagan, Minnesota, Unimproved Land [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments					$ 98,000
Unimproved Land [Member] \| Weston, Wisconsin, Unimproved Land [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments					$ 442,000
Commercial Properties [Member]
REAL ESTATE INVESTMENTS [Abstract]
Number of impaired properties \| property					4
IDENTIFIED INTANGIBLE ASSETS AND LIABILITIES AND GOODWILL [Abstract]
Number of real estate properties disposed \| property			8		2
Commercial Healthcare [Member]
REAL ESTATE INVESTMENTS [Abstract]
Number of impaired properties \| property			1
Industrial [Member] \| St. Louis Park, Minnesota, Industrial Property [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments							$ 864,000
Industrial [Member] \| Clive, Iowa, Industrial Property [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments							402,000
Industrial [Member] \| Roseville, Minnesota, Industrial Property [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments							4,800,000
Office [Member]
REAL ESTATE INVESTMENTS [Abstract]
Number of impaired properties \| property			1
Office [Member] \| Golden Valley, Minnesota [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments							2,100,000
Office [Member] \| Bloomington, Minnesota [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments							329,000
Office [Member] \| Edina, Minnesota, Office Property [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments							835,000
Retail [Member] \| Kalispell, Montana, Retail Property [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments					$ 2,100,000
Retail [Member] \| Anoka, Minnesota, Retail Property [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments							265,000
Office Property [Member] \| Eden Prairie Minnesota Member
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments			$ 440,000
Office Property [Member] \| Golden Valley, Minnesota [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments					183,000
Office Property [Member] \| Minneapolis, Minnesota, Office Property [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments					1,800,000
Office Property [Member] \| Boise, Idaho, Office Property [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments					1,400,000
Medical Property [Member] \| Sartell, Minnesota, Healthcare Property [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments			1,900,000
Discontinued Operations [Member]
REAL ESTATE INVESTMENTS [Abstract]
Impairment of real estate investments			$ 440,000		$ 1,400,000		$ 36,700,000
Discontinued Operations [Member] \| Retail [Member]
RECLASSIFICATIONS [Abstract]
Number of real estate properties classified as discontinued operations \| property		17
Discontinued Operations [Member] \| Office Property [Member]
RECLASSIFICATIONS [Abstract]
Number of real estate properties classified as discontinued operations \| property		48
Discontinued Operations [Member] \| Medical Property [Member]
RECLASSIFICATIONS [Abstract]
Number of real estate properties classified as discontinued operations \| property		1
Discontinued Operations [Member] \| Senior Housing properties [Member]
RECLASSIFICATIONS [Abstract]
Number of real estate properties classified as discontinued operations \| property	34
Assets Held for Sale [Member] \| Multi-Family Residential [Member]
REAL ESTATE HELD FOR SALE [Abstract]
Number of real estate properties classified as held for sale \| property			1
Assets Held for Sale [Member] \| Unimproved Land [Member]
REAL ESTATE HELD FOR SALE [Abstract]
Number of real estate properties classified as held for sale \| property			3
Assets Held for Sale [Member] \| Industrial [Member]
REAL ESTATE HELD FOR SALE [Abstract]
Number of real estate properties classified as held for sale \| property			1
Assets Held for Sale [Member] \| Office [Member]
REAL ESTATE HELD FOR SALE [Abstract]
Number of real estate properties classified as held for sale \| property					1
Assets Held for Sale [Member] \| Medical Property [Member]
REAL ESTATE HELD FOR SALE [Abstract]
Number of real estate properties classified as held for sale \| property			35		1