BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES, INVOL CONV OF ASSETS, FINANCING LIAB, VIE (Details) $ in Thousands	6 Months Ended
Oct. 31, 2015 USD ($) Partners
Other Liabilities [Line Items]
Proceeds from sale of property	$ 7,900
Contract for deed	29,000
Sale lease-back recorded in other liabilities	$ 7,900
IRET - Minot Apartments, LLC [Member]
Variable Interest Entity [Line Items]
Percentage of ownership in VIE	51.00%
IRET - Minot Apartments, LLC [Member] \| Third Party Debt [Member]
Variable Interest Entity [Line Items]
Percentage of project financed	69.00%
IRET - Minot Apartments, LLC [Member] \| Debt from IRET [Member]
Variable Interest Entity [Line Items]
Percentage of project financed	7.00%
IRET - Minot Apartments, LLC [Member] \| Real Estate Development Company [Member]
Variable Interest Entity [Line Items]
Percentage of ownership in VIE	49.00%
IRET - 71 France, LLC [Member]
Variable Interest Entity [Line Items]
Estimated total costs of joint venture project	$ 73,290
Number of other partners in joint venture \| Partners	2
Percentage of ownership in VIE	52.60%
Threshold in-service period of project	24 months
IRET - 71 France, LLC [Member] \| Third Party Debt [Member]
Variable Interest Entity [Line Items]
Percentage of project financed	69.00%
IRET - 71 France, LLC [Member] \| Debt from IRET [Member]
Variable Interest Entity [Line Items]
Percentage of project financed	7.00%
IRET - 71 France, LLC [Member] \| Real Estate Development Company [Member]
Variable Interest Entity [Line Items]
Percentage of ownership in VIE	47.40%
Financing Liability [Member]
Other Liabilities [Line Items]
Financing liability balance	$ 7,900

The estimated total costs of the project related to the joint venture considered as variable interest entity.

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Refers to the number of other partners in a joint venture.

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The percentage of project financed in a joint venture considered as variable interest entity.

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The amount of deed contract related to the sale of non-core assisted living property that was subsequently leased back to the seller with an option to repurchase the property at a specified price.

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Refers to the in-service period of project after which the company will have management and leasing responsibilities.

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The aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet.

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The liability due as of the balance sheet date for leasebacks accounted for using the deposit method.

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Amount of cash inflow before closing and deferred financing costs received by a seller-lessee in a sale-leaseback recognized in financing activities.

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Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

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