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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES, Reclassifications, Proceeds from Financing Liability and Variable Interest Entity (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2016 USD ($) property | Apr. 30, 2016 property | Apr. 30, 2014 USD ($)
Proceeds From Financing Liability [Abstract] |  |  |
Proceeds from sale of property |  |  | $ 7.9
Contract for deed |  |  | 29.0
Sale lease-back recorded in other liabilities |  |  | $ 7.9
Financing liability balance | $ 7.9 |  |
Senior Housing properties [Member] | Discontinued Operations, Held-for-sale [Member] |  |  |
Reclassifications [Abstract] |  |  |
Number of real estate properties classified as held for sale in discontinued operations | property | 34 | 34 |

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- Definition 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. + References No definition available. + Details
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- Definition The aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The liability due as of the balance sheet date for leasebacks accounted for using the deposit method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6456341&loc=d3e50796-112755 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6452660&loc=d3e36991-112694 + Details
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- Definition Amount of cash inflow before closing and deferred financing costs received by a seller-lessee in a sale-leaseback recognized in financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51831-112757 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 51 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51840-112757 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51843-112757 + Details
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