Represents the amount of debt provided.

No definition available.

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- Definition

Represents the amount of debt provided by entity.

+ References

No definition available.

+ Details

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- Definition

Represents the amount of debt provided by third party.

+ References

No definition available.

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- Definition

Discontinued Operations, Ownership Interest Disposed

+ References

No definition available.

+ Details

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- Definition

Disposal Group, Including Discontinued Operation, Note Receivable Payment Period

+ References

No definition available.

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- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

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- Definition

The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.14(d))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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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.

+ Details

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- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Discontinued Operations and Dispositions of Real Estate - RIDEA II Sale Transaction (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		12 Months Ended
	Nov. 01, 2017	Jan. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sales of real estate, net					$ 356,641	$ 164,698	$ 6,377
HCP/CPA/Brookdale JV
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Debt provided		$ 602,000
Debt provided by third-party		360,000
Debt provided by entity		242,000
Net proceeds from the RIDEA II transaction		480,000
HCP/CPA/Brookdale JV \| RIDEA II
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Debt provided by entity		$ 242,000
Equity method investment ownership interest disposed	40.00%
Note receivable payment period	1 year
RIDEA II
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment ownership percentage		40.00%			40.00%
RIDEA II \| HCP/CPA/Brookdale JV
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment ownership percentage		40.00%
Disposed of by Sale \| RIDEA II
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sales of real estate, net				$ 99,000
Forecast \| HCP/CPA/Brookdale JV \| RIDEA II
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment ownership interest disposed			40.00%
Consideration receivable from sale of ownership interest			$ 91,000