DESCRIPTION OF BUSINESS (Details)	Sep. 30, 2016 property tenant	Dec. 31, 2015 property
Real estate properties
Number of real estate properties	1,300
Number of properties leased	575
Number of real estate properties	39
Number of properties classified as held-for-sale	32	11
Brookdale Senior Living
Real estate properties
Number of properties included in investments in unconsolidated entities	6
Number of properties leased	140
Number of properties included in investments in unconsolidated entities, pursuant to management agreement	1
Kindred
Real estate properties
Number of properties included in investments in unconsolidated entities	1
Number of properties leased	68
Ardent
Real estate properties
Number of properties leased	10
Brookdale Senior Living Inc. and Kindred Healthcare, Inc.
Real estate properties
Concentration risk, number of tenants \| tenant	3
Triple-Net Leased Properties
Real estate properties
Number of real estate properties	34
Number of properties classified as held-for-sale	25	2
Development Projects
Real estate properties
Number of real estate properties	5
Number of properties included in investments in unconsolidated entities	2
Seniors Housing Communities
Real estate properties
Number of independent third party managed properties	298

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

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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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Concentration Risk, Number of Tenants

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- Definition

The number of properties that are managed by the independent third party.

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- Definition

The number of properties that are accounted for under the equity method of accounting.

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- Definition

Represents the number of the properties which are classified as held for sale.

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- Definition

Number of Properties Included in Investments in Unconsolidated Entities

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- Definition

Number Of Properties Included In Investments In Unconsolidated Entities, Pursuant To Management Agreement

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- Definition

The number of properties owned that are leased to unaffiliated tenants under triple-net lease terms.

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