PRO FORMA FINANCIAL INFORMATION (UNAUDITED) - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) Customer Property Facilitiy	Dec. 31, 2015 Property Facilitiy	Dec. 31, 2014 Property
Business Acquisition [Line Items]
Number of real estate properties acquired | Property	7	24	42
Acquisition pursuit costs | $	$ 1.1
Skilled Nursing/Transitional Care Facilities [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Number of real estate properties acquired | Facilitiy	1	4
Senior Housing [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Number of real estate properties acquired	3	20