RECENT REAL ESTATE ACQUISITIONS - Narrative (Details) - Recent Real Estate Acquisitions $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) Property	Dec. 31, 2018 USD ($) Property
Business Acquisition [Line Items]
Revenues from the properties acquired | $	$ 0.8	$ 44.0
Net income attributable to common stockholders from the properties acquired | $	$ 0.4	$ 14.0
Tenant Origination and Absorption Costs
Business Acquisition [Line Items]
Finite-lived intangible assets, weighted average amortization period as of date of acquisition	6 years	13 years
Tenant Relationship
Business Acquisition [Line Items]
Finite-lived intangible assets, weighted average amortization period as of date of acquisition	21 years	22 years
Senior Housing Communities
Business Acquisition [Line Items]
Number of acquired properties	2	8
Specialty Hospitals and Other
Business Acquisition [Line Items]
Number of acquired properties	2
Senior Housing - Managed
Business Acquisition [Line Items]
Number of acquired properties	1	11
Skilled Nursing/Transitional Care
Business Acquisition [Line Items]
Number of acquired properties		2