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REDEEMABLE NONCONTROLLING INTERESTS (Details) (USD $) | 9 Months Ended |
--- | --- | ---
Jan. 31, 2015 | Jan. 31, 2014 | Apr. 30, 2014
Redeemable [Line Items] |  |  |
Balance at April 30, |  |  | $ 6,203,000 us-gaap_TemporaryEquityCarryingAmountAttributableToParent
Balance at close of period | 6,340,000 us-gaap_TemporaryEquityCarryingAmountAttributableToParent |  | 6,203,000 us-gaap_TemporaryEquityCarryingAmountAttributableToParent
Redeemable [Member] |  |  |
Redeemable [Line Items] |  |  |
Balance at April 30, | 6,203,000 us-gaap_TemporaryEquityCarryingAmountAttributableToParent / iret_RedeemableNoncontrollingInterestsAxis = iret_RedeemableMember | 5,937,000 us-gaap_TemporaryEquityCarryingAmountAttributableToParent / iret_RedeemableNoncontrollingInterestsAxis = iret_RedeemableMember |
Net income | 137,000 us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest / iret_RedeemableNoncontrollingInterestsAxis = iret_RedeemableMember | 176,000 us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest / iret_RedeemableNoncontrollingInterestsAxis = iret_RedeemableMember |
Balance at close of period | 6,340,000 us-gaap_TemporaryEquityCarryingAmountAttributableToParent / iret_RedeemableNoncontrollingInterestsAxis = iret_RedeemableMember | 6,113,000 us-gaap_TemporaryEquityCarryingAmountAttributableToParent / iret_RedeemableNoncontrollingInterestsAxis = iret_RedeemableMember |
Restatement Adjustment [Member] | Noncontrolling Interests [Member] |  |  |
Overstatement of equity |  | 6,100,000 us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |
Restatement Adjustment [Member] | Equity [Member] |  |  |
Overstatement of equity |  | $ (6,100,000)us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioAdjustmentMember |

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- Definition Amount of Net Income (Loss) attributable to redeemable noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.19) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of each individual error being corrected in the correcting adjustment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 1.N.Q3) -URI http://asc.fasb.org/extlink&oid=26874127&loc=d3e30840-122693 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 1 -Section N + Details
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- Definition Carrying amount, attributable to parent, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer. + References No definition available. + Details
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