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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			9 Months Ended	12 Months Ended
	Jan. 31, 2017 USD ($) property	Oct. 31, 2016 property	Apr. 30, 2016 property	Jan. 31, 2017 USD ($) 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			$ 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	21
Senior Housing properties [Member] | Discontinued Operations, Disposed of by Sale [Member]
Reclassifications [Abstract]
Number of real estate properties sold | property	5	8

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- Definition

Number of real estate properties classified as held for sale in discontinued operations.

+ References

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The number of real estate properties sold during the period.

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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.

+ References

No definition available.

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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

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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

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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.

+ 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

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-Name Accounting Standards Codification
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-Section 55
-Paragraph 51
-URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51840-112757

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-Section 55
-Paragraph 52
-URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51843-112757

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