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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES, INVOL CONV OF ASSETS, FINANCING LIAB, VIE (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Jul. 31, 2015 USD ($) Partners | Jul. 31, 2013 USD ($) | Jul. 30, 2013 USD ($)
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 (in hundredths) | 52.90% |  |
IRET - Minot Apartments, LLC [Member] | Third Party Debt [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Percentage of project financed (in hundredths) | 69.00% |  |
IRET - Minot Apartments, LLC [Member] | Debt from IRET [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Percentage of project financed (in hundredths) | 7.00% |  |
IRET - Minot Apartments, LLC [Member] | Real Estate Development Company [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Percentage of ownership in VIE (in hundredths) | 47.10% |  |
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 (in hundredths) | 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 (in hundredths) | 69.00% |  |
IRET - 71 France, LLC [Member] | Debt from IRET [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Percentage of project financed (in hundredths) | 7.00% |  |
IRET - 71 France, LLC [Member] | Real Estate Development Company [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Percentage of ownership in VIE (in hundredths) | 47.40% |  |
Financing Liability [Member] |  |  |
Other Liabilities [Line Items] |  |  |
Financing liability balance | $ 7,900 |  |

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