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COMMITMENTS AND CONTINGENCIES (Details) (USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2015 | Jan. 31, 2014 | Apr. 30, 2014
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Total property cost subject to purchase options | $ 2,093,148,000 us-gaap_RealEstateInvestmentPropertyAtCost |  |  | $ 2,093,148,000 us-gaap_RealEstateInvestmentPropertyAtCost |  |  | $ 1,996,031,000 us-gaap_RealEstateInvestmentPropertyAtCost
Total gross rental revenue from properties subject to purchase options | 60,440,000 us-gaap_OperatingLeasesIncomeStatementLeaseRevenue |  | 56,156,000 us-gaap_OperatingLeasesIncomeStatementLeaseRevenue | 176,401,000 us-gaap_OperatingLeasesIncomeStatementLeaseRevenue |  | 164,256,000 us-gaap_OperatingLeasesIncomeStatementLeaseRevenue |
Redemption basis |  |  |  | one-for-one |  |  |
Period to hold the beneficial interest, minimum |  |  |  | 1 year |  |  |
Number of consecutive trading days for valuation |  |  |  | 10 days |  |  |
Aggregate redemption value of UPREIT Units of operating partnership owned by limited partners | 122,000,000 iret_RedemptionValueOfUpreitUnits |  | 186,900,000 iret_RedemptionValueOfUpreitUnits | 122,000,000 iret_RedemptionValueOfUpreitUnits |  | 186,900,000 iret_RedemptionValueOfUpreitUnits |
Tenant Improvements | 9,300,000 us-gaap_TenantImprovements |  |  | 9,300,000 us-gaap_TenantImprovements |  |  |
Commitment period for tenant improvements |  |  |  | 12 months |  |  |
Anticipated Total Cost | 379,870,000 iret_AnticipatedTotalCost |  |  | 379,870,000 iret_AnticipatedTotalCost |  |  |
Project costs incurred to date | 263,105,000 iret_ProjectCostsIncurredToDate | [1] |  | 263,105,000 iret_ProjectCostsIncurredToDate | [1] |  |
Construction interest capitalized | 1,400,000 us-gaap_RealEstateInventoryCapitalizedInterestCostsIncurred |  | 778,000 us-gaap_RealEstateInventoryCapitalizedInterestCostsIncurred | 3,600,000 us-gaap_RealEstateInventoryCapitalizedInterestCostsIncurred |  | 2,100,000 us-gaap_RealEstateInventoryCapitalizedInterestCostsIncurred |
Subject to purchase options [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Number of properties subject to purchase options | 15 us-gaap_NumberOfRealEstateProperties / iret_AdditionalProjectInformationAxis = iret_SubjectToPurchaseOptionsMember |  |  | 15 us-gaap_NumberOfRealEstateProperties / iret_AdditionalProjectInformationAxis = iret_SubjectToPurchaseOptionsMember |  |  |
Total property cost subject to purchase options | 120,500,000 us-gaap_RealEstateInvestmentPropertyAtCost / iret_AdditionalProjectInformationAxis = iret_SubjectToPurchaseOptionsMember |  |  | 120,500,000 us-gaap_RealEstateInvestmentPropertyAtCost / iret_AdditionalProjectInformationAxis = iret_SubjectToPurchaseOptionsMember |  |  |
Total gross rental revenue from properties subject to purchase options |  |  |  | 7,700,000 us-gaap_OperatingLeasesIncomeStatementLeaseRevenue / iret_AdditionalProjectInformationAxis = iret_SubjectToPurchaseOptionsMember |  |  |
Number of properties subject to restrictions on taxable dispositions | 15 us-gaap_NumberOfRealEstateProperties / iret_AdditionalProjectInformationAxis = iret_SubjectToPurchaseOptionsMember |  |  | 15 us-gaap_NumberOfRealEstateProperties / iret_AdditionalProjectInformationAxis = iret_SubjectToPurchaseOptionsMember |  |  |
Subject to restrictions on taxable dispositions [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Number of properties subject to purchase options | 95 us-gaap_NumberOfRealEstateProperties / iret_AdditionalProjectInformationAxis = iret_SubjectToRestrictionsOnTaxableDispositionsMember |  |  | 95 us-gaap_NumberOfRealEstateProperties / iret_AdditionalProjectInformationAxis = iret_SubjectToRestrictionsOnTaxableDispositionsMember |  |  |
Number of properties subject to restrictions on taxable dispositions | 95 us-gaap_NumberOfRealEstateProperties / iret_AdditionalProjectInformationAxis = iret_SubjectToRestrictionsOnTaxableDispositionsMember |  |  | 95 us-gaap_NumberOfRealEstateProperties / iret_AdditionalProjectInformationAxis = iret_SubjectToRestrictionsOnTaxableDispositionsMember |  |  |
Area of real estate property subject to restrictions on taxable dispositions | 4,100,000 us-gaap_AreaOfRealEstateProperty / iret_AdditionalProjectInformationAxis = iret_SubjectToRestrictionsOnTaxableDispositionsMember |  |  | 4,100,000 us-gaap_AreaOfRealEstateProperty / iret_AdditionalProjectInformationAxis = iret_SubjectToRestrictionsOnTaxableDispositionsMember |  |  |
Number of apartment units at properties subject to restrictions on taxable dispositions | 4,831 us-gaap_NumberOfUnitsInRealEstateProperty / iret_AdditionalProjectInformationAxis = iret_SubjectToRestrictionsOnTaxableDispositionsMember |  |  | 4,831 us-gaap_NumberOfUnitsInRealEstateProperty / iret_AdditionalProjectInformationAxis = iret_SubjectToRestrictionsOnTaxableDispositionsMember |  |  |
Real estate investment amount of properties (net of accumulated depreciation) | 726,900,000 us-gaap_RealEstateInvestments / iret_AdditionalProjectInformationAxis = iret_SubjectToRestrictionsOnTaxableDispositionsMember |  |  | 726,900,000 us-gaap_RealEstateInvestments / iret_AdditionalProjectInformationAxis = iret_SubjectToRestrictionsOnTaxableDispositionsMember |  |  |
Commons at Southgate, Minot, North Dakota [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Number of apartment units | 233 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_CommonsAtSouthgateMinotNorthDakotaMember | [2] |  | 233 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_CommonsAtSouthgateMinotNorthDakotaMember | [2] |  |
Anticipated Total Cost | 37,201,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_CommonsAtSouthgateMinotNorthDakotaMember | [2] |  | 37,201,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_CommonsAtSouthgateMinotNorthDakotaMember | [2] |  |
Project costs incurred to date | 34,612,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_CommonsAtSouthgateMinotNorthDakotaMember | [1],[2] |  | 34,612,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_CommonsAtSouthgateMinotNorthDakotaMember | [1],[2] |  |
Interest in joint venture (in hundredths) | 52.90%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RealEstatePropertiesAxis = iret_CommonsAtSouthgateMinotNorthDakotaMember | [2] |  | 52.90%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RealEstatePropertiesAxis = iret_CommonsAtSouthgateMinotNorthDakotaMember | [2] |  |
Bismarck, North Dakota [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Number of apartment units pending acquisition | 119 iret_NumberOfApartmentUnitsPendingAcquisition / us-gaap_RealEstatePropertiesAxis = iret_BismarckNorthDakotaMember |  |  | 119 iret_NumberOfApartmentUnitsPendingAcquisition / us-gaap_RealEstatePropertiesAxis = iret_BismarckNorthDakotaMember |  |  |
Purchase Price of Pending Acquisition |  |  |  | 15,000,000 iret_PurchasePriceofPendingAcquisition / us-gaap_RealEstatePropertiesAxis = iret_BismarckNorthDakotaMember |  |  |
Value of limited partnership units to be issued in pending acquisition | 700,000 iret_ValueOfLimitedPartnershipUnitsToBeIssuedInPending / us-gaap_RealEstatePropertiesAxis = iret_BismarckNorthDakotaMember |  |  | 700,000 iret_ValueOfLimitedPartnershipUnitsToBeIssuedInPending / us-gaap_RealEstatePropertiesAxis = iret_BismarckNorthDakotaMember |  |  |
Cash to be paid for pending acquisition | 14,300,000 iret_CashToBePaidForPendingAcquisition / us-gaap_RealEstatePropertiesAxis = iret_BismarckNorthDakotaMember |  |  | 14,300,000 iret_CashToBePaidForPendingAcquisition / us-gaap_RealEstatePropertiesAxis = iret_BismarckNorthDakotaMember |  |  |
Cardinal Point, Grand Forks, North Dakota [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Number of apartment units | 251 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_CardinalPointGrandForksNorthDakotaMember |  |  | 251 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_CardinalPointGrandForksNorthDakotaMember |  |  |
Anticipated Total Cost | 40,042,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_CardinalPointGrandForksNorthDakotaMember |  |  | 40,042,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_CardinalPointGrandForksNorthDakotaMember |  |  |
Project costs incurred to date | 19,885,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_CardinalPointGrandForksNorthDakotaMember | [1] |  | 19,885,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_CardinalPointGrandForksNorthDakotaMember | [1] |  |
Estimated year for completion |  |  |  | 2Q 2016 |  |  |
Cypress Court - St. Cloud, MN [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Number of apartment units | 64 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_CypressCourtStCloudMnMember | [3] |  | 64 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_CypressCourtStCloudMnMember | [3] |  |
Anticipated Total Cost | 7,028,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_CypressCourtStCloudMnMember | [3] |  | 7,028,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_CypressCourtStCloudMnMember | [3] |  |
Project costs incurred to date | 6,638,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_CypressCourtStCloudMnMember | [1],[3] |  | 6,638,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_CypressCourtStCloudMnMember | [1],[3] |  |
Interest in joint venture (in hundredths) | 86.10%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RealEstatePropertiesAxis = iret_CypressCourtStCloudMnMember | [3] |  | 86.10%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RealEstatePropertiesAxis = iret_CypressCourtStCloudMnMember | [3] |  |
Grand Forks, ND [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Number of apartment units pending acquisition | 74 iret_NumberOfApartmentUnitsPendingAcquisition / us-gaap_RealEstatePropertiesAxis = iret_GrandForksNdMember |  |  | 74 iret_NumberOfApartmentUnitsPendingAcquisition / us-gaap_RealEstatePropertiesAxis = iret_GrandForksNdMember |  |  |
Purchase Price of Pending Acquisition |  |  |  | 9,300,000 iret_PurchasePriceofPendingAcquisition / us-gaap_RealEstatePropertiesAxis = iret_GrandForksNdMember |  |  |
Value of limited partnership units to be issued in pending acquisition | 400,000 iret_ValueOfLimitedPartnershipUnitsToBeIssuedInPending / us-gaap_RealEstatePropertiesAxis = iret_GrandForksNdMember |  |  | 400,000 iret_ValueOfLimitedPartnershipUnitsToBeIssuedInPending / us-gaap_RealEstatePropertiesAxis = iret_GrandForksNdMember |  |  |
Cash to be paid for pending acquisition | 8,900,000 iret_CashToBePaidForPendingAcquisition / us-gaap_RealEstatePropertiesAxis = iret_GrandForksNdMember |  |  | 8,900,000 iret_CashToBePaidForPendingAcquisition / us-gaap_RealEstatePropertiesAxis = iret_GrandForksNdMember |  |  |
Arcata Apartments, Golden Valley, Minnesota [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Number of apartment units | 165 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_ArcataApartmentsGoldenValleyMinnesotaMember |  |  | 165 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_ArcataApartmentsGoldenValleyMinnesotaMember |  |  |
Anticipated Total Cost | 33,448,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_ArcataApartmentsGoldenValleyMinnesotaMember |  |  | 33,448,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_ArcataApartmentsGoldenValleyMinnesotaMember |  |  |
Project costs incurred to date | 30,384,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_ArcataApartmentsGoldenValleyMinnesotaMember | [1] |  | 30,384,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_ArcataApartmentsGoldenValleyMinnesotaMember | [1] |  |
Chateau II, Minot, North Dakota [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Number of apartment units | 72 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_ChateauIiMinotNorthDakotaMember |  |  | 72 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_ChateauIiMinotNorthDakotaMember |  |  |
Anticipated Total Cost | 14,711,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_ChateauIiMinotNorthDakotaMember |  |  | 14,711,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_ChateauIiMinotNorthDakotaMember |  |  |
Project costs incurred to date | 11,257,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_ChateauIiMinotNorthDakotaMember | [1] |  | 11,257,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_ChateauIiMinotNorthDakotaMember | [1] |  |
Estimated year for completion |  |  |  | 1Q 2016 |  |  |
Eagan, MN - Unimproved Land [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Sales price of pending disposition |  |  |  | 325,000 iret_SaleAmountOfPendingDisposition / us-gaap_RealEstatePropertiesAxis = iret_EaganMNUnimprovedLandMember |  |  |
Deer Ridge - Jamestown, ND [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Number of apartment units | 163 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_DeerRidgeJamestownNdMember |  |  | 163 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_DeerRidgeJamestownNdMember |  |  |
Anticipated Total Cost | 24,519,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_DeerRidgeJamestownNdMember |  |  | 24,519,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_DeerRidgeJamestownNdMember |  |  |
Project costs incurred to date | 11,202,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_DeerRidgeJamestownNdMember | [1] |  | 11,202,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_DeerRidgeJamestownNdMember | [1] |  |
Estimated year for completion |  |  |  | 2Q 2016 |  |  |
RED 20 - Minneapolis, MN [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Area of real estate property subject to restrictions on taxable dispositions | 10,625 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = iret_Red20MinneapolisMnMember | [4] |  | 10,625 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = iret_Red20MinneapolisMnMember | [4] |  |
Number of apartment units | 130 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_Red20MinneapolisMnMember | [4] |  | 130 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_Red20MinneapolisMnMember | [4] |  |
Anticipated Total Cost | 29,462,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_Red20MinneapolisMnMember | [4] |  | 29,462,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_Red20MinneapolisMnMember | [4] |  |
Project costs incurred to date | 28,330,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_Red20MinneapolisMnMember | [1],[4] |  | 28,330,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_Red20MinneapolisMnMember | [1],[4] |  |
Interest in joint venture (in hundredths) | 58.60%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RealEstatePropertiesAxis = iret_Red20MinneapolisMnMember | [4] |  | 58.60%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RealEstatePropertiesAxis = iret_Red20MinneapolisMnMember | [4] |  |
Eagan - Eagan, MN [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Sales price of pending disposition |  |  |  | 950,000 iret_SaleAmountOfPendingDisposition / us-gaap_RealEstatePropertiesAxis = iret_EaganEaganMnMember |  |  |
Maple Grove, MN [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Sales price of pending disposition |  |  |  | 2,700,000 iret_SaleAmountOfPendingDisposition / us-gaap_RealEstatePropertiesAxis = iret_MapleGroveMnMember |  |  |
Minot Office Center - Minot, ND [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Area of real estate property subject to restrictions on taxable dispositions | 7,963 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = iret_MinotOfficeCenterMinotNDMember |  |  | 7,963 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = iret_MinotOfficeCenterMinotNDMember |  |  |
Anticipated Total Cost | 2,923,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_MinotOfficeCenterMinotNDMember |  |  | 2,923,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_MinotOfficeCenterMinotNDMember |  |  |
Project costs incurred to date | 1,802,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_MinotOfficeCenterMinotNDMember | [1] |  | 1,802,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_MinotOfficeCenterMinotNDMember | [1] |  |
Estimated year for completion |  |  |  | 1Q 2016 |  |  |
71 France Phase I - Edina, MN [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Number of apartment units | 181 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_FrancePhaseIEdinaMnMember | [5] |  | 181 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_FrancePhaseIEdinaMnMember | [5] |  |
Anticipated Total Cost | 52,055,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_FrancePhaseIEdinaMnMember | [5] |  | 52,055,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_FrancePhaseIEdinaMnMember | [5] |  |
Project costs incurred to date | 20,787,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_FrancePhaseIEdinaMnMember | [1],[5] |  | 20,787,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_FrancePhaseIEdinaMnMember | [1],[5] |  |
Estimated year for completion |  |  |  | 3Q 2016 | [5] |  |
71 France Phase I - Edina, MN [Member] | Footnote (6) [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Area of real estate property subject to restrictions on taxable dispositions | 21,772 us-gaap_AreaOfRealEstateProperty / iret_AdditionalProjectInformationAxis = iret_Footnote6Member / us-gaap_RealEstatePropertiesAxis = iret_FrancePhaseIEdinaMnMember | [5] |  | 21,772 us-gaap_AreaOfRealEstateProperty / iret_AdditionalProjectInformationAxis = iret_Footnote6Member / us-gaap_RealEstatePropertiesAxis = iret_FrancePhaseIEdinaMnMember | [5] |  |
Number of apartment units | 241 iret_NumberOfApartmentUnits / iret_AdditionalProjectInformationAxis = iret_Footnote6Member / us-gaap_RealEstatePropertiesAxis = iret_FrancePhaseIEdinaMnMember | [5] |  | 241 iret_NumberOfApartmentUnits / iret_AdditionalProjectInformationAxis = iret_Footnote6Member / us-gaap_RealEstatePropertiesAxis = iret_FrancePhaseIEdinaMnMember | [5] |  |
Anticipated Total Cost | 69,900,000 iret_AnticipatedTotalCost / iret_AdditionalProjectInformationAxis = iret_Footnote6Member / us-gaap_RealEstatePropertiesAxis = iret_FrancePhaseIEdinaMnMember | [5] |  | 69,900,000 iret_AnticipatedTotalCost / iret_AdditionalProjectInformationAxis = iret_Footnote6Member / us-gaap_RealEstatePropertiesAxis = iret_FrancePhaseIEdinaMnMember | [5] |  |
Interest in joint venture (in hundredths) | 52.60%us-gaap_EquityMethodInvestmentOwnershipPercentage / iret_AdditionalProjectInformationAxis = iret_Footnote6Member / us-gaap_RealEstatePropertiesAxis = iret_FrancePhaseIEdinaMnMember | [5] |  | 52.60%us-gaap_EquityMethodInvestmentOwnershipPercentage / iret_AdditionalProjectInformationAxis = iret_Footnote6Member / us-gaap_RealEstatePropertiesAxis = iret_FrancePhaseIEdinaMnMember | [5] |  |
PrairieCare Medical - Brooklyn Park, MN [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Area of real estate property subject to restrictions on taxable dispositions | 72,895 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = iret_PrairiecareMedicalBrooklynParkMnMember |  |  | 72,895 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = iret_PrairiecareMedicalBrooklynParkMnMember |  |  |
Anticipated Total Cost | 24,251,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_PrairiecareMedicalBrooklynParkMnMember |  |  | 24,251,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_PrairiecareMedicalBrooklynParkMnMember |  |  |
Project costs incurred to date | 12,195,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_PrairiecareMedicalBrooklynParkMnMember | [1] |  | 12,195,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_PrairiecareMedicalBrooklynParkMnMember | [1] |  |
Estimated year for completion |  |  |  | 2Q 2016 |  |  |
Renaissance Heights I Apartments, Williston, North Dakota [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Number of apartment units | 288 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_RenaissanceHeightsIApartmentsWillistonNorthDakotaMember | [6] |  | 288 iret_NumberOfApartmentUnits / us-gaap_RealEstatePropertiesAxis = iret_RenaissanceHeightsIApartmentsWillistonNorthDakotaMember | [6] |  |
Anticipated Total Cost | 62,362,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_RenaissanceHeightsIApartmentsWillistonNorthDakotaMember | [6] |  | 62,362,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_RenaissanceHeightsIApartmentsWillistonNorthDakotaMember | [6] |  |
Project costs incurred to date | 54,713,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_RenaissanceHeightsIApartmentsWillistonNorthDakotaMember | [1],[6] |  | 54,713,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_RenaissanceHeightsIApartmentsWillistonNorthDakotaMember | [1],[6] |  |
Estimated quarter for completion |  |  |  | 46,000,000 iret_RealEstateConstructionEstimatedQuarterForCompletion / us-gaap_RealEstatePropertiesAxis = iret_RenaissanceHeightsIApartmentsWillistonNorthDakotaMember | [6] |  |
Estimated year for completion |  |  |  | 1Q 2016 | [6] |  |
Interest in joint venture (in hundredths) | 70.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RealEstatePropertiesAxis = iret_RenaissanceHeightsIApartmentsWillistonNorthDakotaMember | [6] |  | 70.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RealEstatePropertiesAxis = iret_RenaissanceHeightsIApartmentsWillistonNorthDakotaMember | [6] |  |
Minneapolis, MN [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Sales price of pending disposition |  |  |  | 7,000,000 iret_SaleAmountOfPendingDisposition / us-gaap_RealEstatePropertiesAxis = iret_MinneapolisMNMember |  |  |
Weston, WI [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Sales price of pending disposition |  |  |  | 5,300,000 iret_SaleAmountOfPendingDisposition / us-gaap_RealEstatePropertiesAxis = iret_WestonWIMember |  |  |
Edina 6565 France SMC III - Edina, MN [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Area of real estate property subject to restrictions on taxable dispositions | 57,479 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = iret_Edina6565FranceSmcIiiEdinaMnMember |  |  | 57,479 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = iret_Edina6565FranceSmcIiiEdinaMnMember |  |  |
Anticipated Total Cost | 34,665,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_Edina6565FranceSmcIiiEdinaMnMember |  |  | 34,665,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_Edina6565FranceSmcIiiEdinaMnMember |  |  |
Project costs incurred to date | 16,668,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_Edina6565FranceSmcIiiEdinaMnMember | [1] |  | 16,668,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_Edina6565FranceSmcIiiEdinaMnMember | [1] |  |
Estimated year for completion |  |  |  | 1Q 2016 |  |  |
Minot Wells Fargo Bank - Minot, ND [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Area of real estate property subject to restrictions on taxable dispositions | 4,998 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = iret_MinotWellsFargoBankMinotNdMember |  |  | 4,998 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = iret_MinotWellsFargoBankMinotNdMember |  |  |
Anticipated Total Cost | 3,288,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_MinotWellsFargoBankMinotNdMember |  |  | 3,288,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_MinotWellsFargoBankMinotNdMember |  |  |
Project costs incurred to date | 3,185,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_MinotWellsFargoBankMinotNdMember | [1] |  | 3,185,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_MinotWellsFargoBankMinotNdMember | [1] |  |
Roseville 3075 Long Lake Rd - Roseville, MN [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Area of real estate property subject to restrictions on taxable dispositions | 202,807 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = iret_Roseville3075LongLakeRdRosevilleMnMember |  |  | 202,807 us-gaap_AreaOfRealEstateProperty / us-gaap_RealEstatePropertiesAxis = iret_Roseville3075LongLakeRdRosevilleMnMember |  |  |
Anticipated Total Cost | 13,915,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_Roseville3075LongLakeRdRosevilleMnMember |  |  | 13,915,000 iret_AnticipatedTotalCost / us-gaap_RealEstatePropertiesAxis = iret_Roseville3075LongLakeRdRosevilleMnMember |  |  |
Project costs incurred to date | 8,900,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_Roseville3075LongLakeRdRosevilleMnMember | [1] |  | 8,900,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = iret_Roseville3075LongLakeRdRosevilleMnMember | [1] |  |
Estimated year for completion |  |  |  | 4Q 2015 |  |  |
Minnesota Portfolio [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Sales price of pending disposition |  |  |  | 26,600,000 iret_SaleAmountOfPendingDisposition / us-gaap_RealEstatePropertiesAxis = iret_MinnesotaPortfolioMember |  |  |
Other [Member] |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |
Project costs incurred to date | $ 2,547,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = us-gaap_PartiallyOwnedPropertiesMember | [1] |  | $ 2,547,000 iret_ProjectCostsIncurredToDate / us-gaap_RealEstatePropertiesAxis = us-gaap_PartiallyOwnedPropertiesMember | [1] |  |
[1] | Includes costs related to development projects that are placed in service in phases (Renaissance Heights - $46.0 million).
[2] | The Company is currently an approximately 52.9% partner in the joint venture entity constructing this project; the anticipated total cost amount given is the total cost to the joint venture entity.
[3] | The Company is an approximately 86.1% partner in the joint venture entity constructing this project; the anticipated total cost amount given is the total cost to the joint venture entity.
[4] | The Company is an approximately 58.6% partner in the joint venture entity constructing this project; the anticipated total cost amount given is the total cost to the joint venture entity. The anticipated total cost includes approximately 10,625 square feet of retail space.
[5] | The project will be constructed in three phases, and at the conclusion of construction of the third phase, the Company will have an approximately 52.6% interest in the joint venture entity constructing the project. The anticipated total cost amount given in the table above is the total cost to the joint venture entity of the projects first and second phase. The expected total project cost for all three phases is approximately $73.3 million for a total of approximately 241 residential units and approximately 21,772 square feet of retail space.
[6] | The Company is an approximately 70% partner in the joint venture entity constructing this project; the anticipated total cost amount given is the total cost to the joint venture entity.

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