CONCENTRATION OF CREDIT RISK (Schedule of Concentration Risks) (Details) - property		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017
Concentration Risk [Line Items]
Number of Properties Held for Sale		36		36
Number of senior housing community included in senior living operations			(1)	(1)
Kindred | Revenues | Revenue from Rights Concentration Risk
Concentration Risk [Line Items]
Concentration percentage	[1],[2]	5.10%	5.40%
Kindred | NOI | Revenue from Rights Concentration Risk
Concentration Risk [Line Items]
Concentration percentage	[1]	8.60%	9.30%
Brookdale Senior Living | Revenues | Revenue from Rights Concentration Risk
Concentration Risk [Line Items]
Concentration percentage	[2],[3]	4.70%	4.90%
Brookdale Senior Living | NOI | Revenue from Rights Concentration Risk
Concentration Risk [Line Items]
Concentration percentage	[3]	7.90%	8.30%
Ardent | Revenues | Revenue from Rights Concentration Risk
Concentration Risk [Line Items]
Concentration percentage	[2]	3.10%	3.10%
Ardent | NOI | Revenue from Rights Concentration Risk
Concentration Risk [Line Items]
Concentration percentage		5.20%	5.40%

[1] Includes 36 skilled nursing facilities classified as held for sale at June 30, 2017 that are included in continuing operations.

[2] Total revenues include office building and other services revenue, income from loans and investments and interest and other income.

[3] Excludes one seniors housing community included in senior living operations and includes one seniors housing community classified as held for sale at June 30, 2017 that is included in continuing operations.