Represents the number of properties sold during the period, not categorized as discontinued operations.

No definition available.

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- Definition

The number of properties held for sale at the reporting date.

+ References

No definition available.

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- Definition

Total consideration, cash and noncash, received by seller for the sale of real estate.

+ References

No definition available.

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- Definition

Amount classified as assets attributable to disposal group held for sale or disposed of.

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- Definition

Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of, expected to be disposed of after one year or the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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
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-Section S99
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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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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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Discontinued Operations and Dispositions of Real Estate - Disposition of Real Estate (Details) $ in Thousands	1 Months Ended				3 Months Ended		9 Months Ended
	Aug. 31, 2017 USD ($) property	Apr. 30, 2017 USD ($) property	Mar. 31, 2017 USD ($) property	Jan. 31, 2017 USD ($) facility	Sep. 30, 2017 USD ($) property	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) property	Sep. 30, 2016 USD ($) property	Dec. 31, 2016 USD ($) property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale, net					$ 216,074		$ 216,074		$ 927,866
Real estate and other related assets, net									$ 809,000
Gain (loss) on sales of real estate, net					$ 5,182	$ (9)	322,852	$ 119,605
Proceeds from sales of real estate, net							$ 1,249,993	211,810
Building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sales of real estate, net								$ 120,000
California
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total consideration for disposition of real estate		$ 27,000
Senior housing triple-net
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties classified as held for sale \| property					3		3		64
Senior housing triple-net \| Building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties disposed \| property	2							2
Gain (loss) on sales of real estate, net	$ 5,000
Proceeds from sales of real estate, net	$ 15,000
Senior housing triple-net \| Brookdale Senior Living
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties classified as held for sale \| property			64
Total consideration for disposition of real estate			$ 1,125,000
Gain (loss) on sales of real estate, net			$ 170,000
Life science
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties classified as held for sale \| property					4		4		4
Number of properties disposed \| facility				4
Total consideration for disposition of real estate				$ 76,000
Gain (loss) on sales of real estate, net				$ 45,000
Life science \| Building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties disposed \| property								1
Proceeds from sales of real estate, net								$ 74,000
Life science \| California \| Building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties disposed \| property		1
Gain (loss) on sales of real estate, net		$ 1,000
Proceeds from sales of real estate, net		$ 5,000
SHOP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties classified as held for sale \| property									1
SHOP \| Building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties disposed \| property								1
Proceeds from sales of real estate, net								$ 6,000
Post-acute/skilled nursing \| Building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties disposed \| property								5
Post-acute/skill nursing and senior housing triplet-net \| Building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sales of real estate, net								$ 130,000
Medical office \| Building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties disposed \| property								3
Proceeds from sales of real estate, net								$ 20,000
Real Estate
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale, net					$ 199,000		$ 199,000