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Real Estate Properties - Dispositions (Details) $ in Thousands	1 Months Ended	3 Months Ended
	Mar. 31, 2018 USD ($) community	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2018 nursing_facility	Mar. 31, 2018 community
Real Estate [Line Items]
Proceeds from sale of properties		$ 216,013	$ 0
Gain on sale of properties		181,154	$ 0
Skilled Nursing Facility
Real Estate [Line Items]
Number of real estate properties held-for-sale				1	2
Real estate, held-for-sale, aggregate sales price	$ 6,500	6,500
Real estate held-for-sale	18,479	18,479
Sunrise Senior Living LLC | Senior Living Communities
Real Estate [Line Items]
Number of real estate properties held-for-sale | community					3
Real estate, held-for-sale, aggregate sales price	$ 96,000	96,000
Rental income recognized		2,776
Sunrise Senior Living LLC | Senior Living Communities | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Real Estate [Line Items]
Number of communities sold | community	2
Proceeds from sale of properties		217,000
Gain on sale of properties		$ 181,154

X

- Definition

Represents the number of communities sold.

+ References

No definition available.

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- Definition

The number of real estate properties owned by the entity, which are classified as held for sale as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

Real Estate, Held-For-Sale, Aggregate Sales Price

+ References

No definition available.

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- Definition

Amount of rental income attributable to disposal group, including, but not limited to, discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760

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X

- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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- Definition

Cash received from the sale of real estate that is held for investment, that is, it is part of an investing activity during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585

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- Definition

Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(f))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Details

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