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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- Definition

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

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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.

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Number of Potential Board Members

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Number of Board Members Appointed

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- Definition

Remaining ownership percentage retained by investee

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INVESTMENTS IN UNCONSOLIDATED ENTITIES (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) board_member property	Mar. 31, 2019 USD ($)	Dec. 31, 2019
Equity method investments
Number of real estate properties \| property	1,200
Management Service
Equity method investments
Management fees \| $	$ 1.0	$ 0.7
the Fund [Member]
Equity method investments
Equity Method Investment, Ownership Percentage	21.00%
Atria
Equity method investments
Equity Method Investment, Ownership Percentage	34.00%
Number of board members appointed	2
Number of board members	6
Eclipse Senior Living
Equity method investments
Equity Method Investment, Ownership Percentage	34.00%
Number of board members appointed	2
Number of board members	6
Remaining ownership percentage retained by investee	66.00%
Ardent
Equity method investments
Equity Method Investment, Ownership Percentage	9.80%
Number of board members appointed	1
Number of board members	11
Real Estate Joint Ventures
Equity method investments
Equity Method Investment, Ownership Percentage			25.00%
Unconsolidated Real Estate Entities
Equity method investments
Number of real estate properties \| property	6
Development Projects
Equity method investments
Number of real estate properties \| property	22
Development Projects \| Unconsolidated Real Estate Entities
Equity method investments
Number of real estate properties \| property	4