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v2.4.1.9

EQUITY (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2015 | Jan. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Aggregate gross sales price of common shares of beneficial interest allowed to be sold |  |  | $ 75,000,000 iret_AggregateGrossSalesPriceOfCommonSharesOfBeneficialInterestAllowedToBeSold |
Units converted to common shares (in shares) | 333,000 us-gaap_ConversionOfStockSharesConverted1 | 37,000 us-gaap_ConversionOfStockSharesConverted1 | 6,700,000 us-gaap_ConversionOfStockSharesConverted1 | 197,000 us-gaap_ConversionOfStockSharesConverted1
Units converted to common shares | 811,000 us-gaap_ConversionOfStockAmountConverted1 | 185,000 us-gaap_ConversionOfStockAmountConverted1 | 38,500,000 us-gaap_ConversionOfStockAmountConverted1 | 1,100,000 us-gaap_ConversionOfStockAmountConverted1
2008 Incentive Award Plan [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Shares issued (in shares) |  |  | 204,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_IncentiveAwardPlanMember | 13,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_IncentiveAwardPlanMember
Shares issued |  |  | 1,900,000 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_IncentiveAwardPlanMember | 112,000 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_IncentiveAwardPlanMember
Restricted shares related to 2008 Incentive Award Plan |  |  | 105,000 us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_IncentiveAwardPlanMember |
Distribution Reinvestment and Share Purchase Plan [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Shares registered under Distribution Reinvestment and Share Purchase Plan (in shares) |  |  | 10,000,000 iret_SharesRegisteredUnderDistributionReinvestmentAndSharePurchasePlan / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentAndSharePurchasePlanMember |
Shares issued (in shares) | 2,000,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentAndSharePurchasePlanMember | 1,300,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentAndSharePurchasePlanMember | 6,200,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentAndSharePurchasePlanMember | 5,200,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentAndSharePurchasePlanMember
Shares issued | 16,100,000 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentAndSharePurchasePlanMember | 11,100,000 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentAndSharePurchasePlanMember | 34,800,000 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentAndSharePurchasePlanMember | 44,200,000 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentAndSharePurchasePlanMember
Average price of shares issued (in dollars per share) | $ 8.06 iret_SaleOfStockAveragePricePerShare / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentAndSharePurchasePlanMember | $ 8.27 iret_SaleOfStockAveragePricePerShare / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentAndSharePurchasePlanMember | $ 8.20 iret_SaleOfStockAveragePricePerShare / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentAndSharePurchasePlanMember | $ 8.43 iret_SaleOfStockAveragePricePerShare / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentAndSharePurchasePlanMember
Distribution Reinvestment Waiver [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Shares issued (in shares) |  |  | 926,000,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentWaiverMember | 1,400,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentWaiverMember
Shares issued |  |  | $ 8,000,000 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentWaiverMember | $ 12,000,000 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentWaiverMember
Average price of shares issued (in dollars per share) |  |  | $ 8.64 iret_SaleOfStockAveragePricePerShare / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentWaiverMember | $ 8.88 iret_SaleOfStockAveragePricePerShare / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = iret_DistributionReinvestmentWaiverMember

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