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Fair Value Inputs, Earnings before Interest, Taxes, Depreciation, Amortization and Rent Growth Rate

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Investment Company, Annual Percentage Increase

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Lease, Capital Commitment

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Lease, Capital Investment Term

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Represents number of assets sold or transited per definitive agreements.

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Number Of Properties Acquired

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Number Of Properties To Be Sold

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Number of Leases To Be Terminated

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Number of Properties to be Restructured

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Operating Lease, Rental Concessions

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Percent of Sales Proceeds

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

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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

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Gain (loss) related to the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one party, or a failure to perform.

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Fair value portion of investments in an entity not consolidated. Includes, but is not limited to, investments in an entity that is affiliated with the reporting entity by means of direct or indirect ownership, an entity in which the reporting entity shares control of the entity with another party or group, an entity which the company has significant influence, but does not have control and subsidiaries that are not required to be consolidated and are accounted for using the equity or cost method.

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The number of real estate properties owned as of the balance sheet date.

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The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

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The cash outflow associated with the purchase of noncontrolling interest during the period.

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The cash inflow from the sale of real estate held-for-investment and real estate joint ventures.

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Value of input used to measure direct or indirect retained investment in derecognized group of assets constituting transfer of business or nonprofit activity, excluding conveyance of oil and gas mineral right and transfer of product or service in contract with customer.

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Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

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Master Transactions and Cooperation Agreement with Brookdale (Details) $ in Thousands		1 Months Ended					3 Months Ended				12 Months Ended
	Jan. 31, 2020 USD ($) property	Oct. 31, 2019 USD ($) property lease	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Nov. 30, 2017 USD ($) property facility	Mar. 31, 2017 USD ($) facility	Dec. 31, 2018 property facility	Sep. 30, 2018 facility	Jun. 30, 2018 facility	Mar. 31, 2018 facility	Dec. 31, 2019 USD ($) property	Dec. 31, 2018 USD ($) property	Dec. 31, 2017 USD ($) property facility	Sep. 30, 2019 property	Jun. 30, 2019 property	Mar. 31, 2019 property	Jan. 01, 2018 USD ($) property
Real Estate Properties [Line Items]
Non-cash lease and management fee termination loss (income), net \| $											$ 0	$ 0	$ 54,641
Payments to acquire additional interest in subsidiaries \| $			$ 63,000	$ 32,000
Management fee rate												5.00%
Operating expenses \| $											$ 879,370	$ 705,038	$ 666,251
RIDEA Facilities
Real Estate Properties [Line Items]
Ownership percentage (as a percent)					90.00%
Brookedale MTCA
Real Estate Properties [Line Items]
Number of assets to be sold (in properties)							19					19
Assets leased to others
Real Estate Properties [Line Items]
Number of assets sold or transitioned												37
Assets leased to others \| RIDEA Facilities
Real Estate Properties [Line Items]
Number of real estate properties \| facility					58
Other non-reportable segments
Real Estate Properties [Line Items]
Number of assets to be sold (in properties)											2
Other non-reportable segments \| Assets leased to others \| CCRC JV Investment
Real Estate Properties [Line Items]
Number of real estate properties		15
Senior housing triple-net
Real Estate Properties [Line Items]
Number of assets to be sold (in properties)																2
Number of properties disposed \| facility						64			2				4
Total consideration for disposition of real estate \| $						$ 1,125,000
Senior housing triple-net \| Assets leased to others
Real Estate Properties [Line Items]
Number of real estate properties		43			78
Number of assets to be sold (in properties)					2
Right to sell, or transition, number of properties (in properties)					32
Rent concessions \| $																	$ 5,000
Number of properties with rent concessions (in properties)																	3
Total consideration for disposition of real estate \| $					$ 35,000
Number of assets sold or transitioned												17
Reduction in rental and related revenues \| $												$ 20,000
Fair value inputs (in properties)												32	32
Senior housing triple-net \| Assets leased to others \| Brookedale MTCA
Real Estate Properties [Line Items]
Number of assets to be sold (in properties)							11					11
SHOP
Real Estate Properties [Line Items]
Number of assets to be sold (in properties)											7			1	1	9
Number of properties disposed \| facility							2	11	8	2			5
SHOP \| Brookedale MTCA
Real Estate Properties [Line Items]
Number of assets to be sold (in properties)							8					8
SHOP \| Assets leased to others
Real Estate Properties [Line Items]
Number of assets sold or transitioned												20
SHOP \| Assets leased to others \| RIDEA Facilities
Real Estate Properties [Line Items]
Number of real estate properties \| facility					36
Total consideration for disposition of real estate \| $					$ 240,000
SHOP \| Assets leased to others \| Brookedale MTCA
Real Estate Properties [Line Items]
Number of assets to be sold (in properties)					4
SHOP \| Assets Under Management Agreements
Real Estate Properties [Line Items]
Fair value inputs (in properties)												36
Minimum
Real Estate Properties [Line Items]
EBITDAR growth rates												0.00%
Maximum
Real Estate Properties [Line Items]
EBITDAR growth rates												3.00%
Discount rate
Real Estate Properties [Line Items]
Real estate capitalization rate							0.12					0.12
Cap rate \| Minimum
Real Estate Properties [Line Items]
Real estate capitalization rate							0.06					0.06
Cap rate \| Maximum
Real Estate Properties [Line Items]
Real estate capitalization rate							0.07					0.07
Real estate \| SHOP \| Assets Under Management Agreements
Real Estate Properties [Line Items]
Operating expenses \| $												$ 35,000
CCRC JV Investment
Real Estate Properties [Line Items]
Investment ownership percentage		49.00%									49.00%
CCRC JV
Real Estate Properties [Line Items]
Percent of noncontrolling interest acquired					10.00%
Brookedale MTCA
Real Estate Properties [Line Items]
Number of properties disposed		18
Cash proceeds \| $		$ 385,000
Brookedale MTCA \| 2019 Amended Master Lease
Real Estate Properties [Line Items]
Annual rent escalator		2.40%
Brookedale MTCA \| CCRC JV Investment
Real Estate Properties [Line Items]
Number of real estate properties		15
Number of properties acquired		13
Brookedale MTCA \| Assets leased to others \| 2019 Amended Master Lease
Real Estate Properties [Line Items]
Number of leases to be terminated (in properties) \| lease		1
Number of properties to be restructured		24
Percent of sales proceeds		6.50%
Number of properties to be reallocated		14
Amount of future rent to be paid \| $		$ 20,000
Capital investment \| $		$ 35,000
Annual percentage increase		7.00%
Capital investment term		5 years
Brookedale MTCA \| Other non-reportable segments \| Assets leased to others \| CCRC JV Investment
Real Estate Properties [Line Items]
Number of real estate properties		13
Brookedale MTCA \| CCRC JV Investment
Real Estate Properties [Line Items]
Investment ownership percentage		51.00%
Interest acquired		51.00%
Purchase cost \| $		$ 1,060,000
Non-cash lease and management fee termination loss (income), net \| $		$ 100,000
Number of assets to be sold (in properties)		2
Subsequent Event \| SHOP
Real Estate Properties [Line Items]
Number of assets to be sold (in properties)	6
Subsequent Event \| Brookedale MTCA \| Assets leased to others \| 2019 Amended Master Lease
Real Estate Properties [Line Items]
Number of assets to be sold (in properties)	2
Capital investment term	5 years
Subsequent Event \| Brookedale MTCA \| CCRC JV Investment
Real Estate Properties [Line Items]
Non-cash lease and management fee termination loss (income), net \| $	$ 100,000