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ACQUISITIONS, DEVELOPMENT PROJECTS PLACED IN SERVICE AND DISPOSITIONS - DEVELOPMENT PROJECTS PLACED IN SERVICE (Details) - Development Projects Placed in Service [Member] $ in Thousands | 3 Months Ended | 12 Months Ended | 24 Months Ended |
--- | --- | --- | --- | ---
Jul. 31, 2016 USD ($) item | Apr. 30, 2017 USD ($) | Apr. 30, 2016 USD ($) | Jul. 31, 2017 USD ($)
Business Acquisition [Line Items] |  |  |  |
Land | $ 4,721 |  |  |
Building | 67,509 |  |  |
Development cost | $ 72,230 |  |  | $ 0
Multi-Family Residential [Member] | 71 France - Edina, MN [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Date placed in service | May 01, 2016 |  |  |
Land | $ 4,721 |  |  |
Building | 67,509 |  |  |
Development cost | $ 72,230 |  |  |
Number of apartment units | item | 241 |  |  |
Development costs paid |  | $ 1,300 | $ 70,900 |
Interest in joint venture (in hundredths) |  |  |  | 52.60%

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- Definition Amount of facility held for productive use including, but not limited to, office, production, storage and distribution facilities, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition The capitalized costs incurred during the period (excluded from amortization) to obtain access to proved reserves and to provide facilities for extracting, treating, gathering and storing the oil and gas. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(c)(7)(ii)) -URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(a)(7)) -URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(c)(3)(ii)(A)) -URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862 + Details
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