RECENT REAL ESTATE ACQUISITIONS - Narrative (Details) $ in Thousands, CAD in Millions						3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($) skilled_nursing_bed Facilitiy loan Renewal_Option	Jun. 11, 2015 USD ($) Facilitiy Renewal_Option unit	Jun. 11, 2015 CAD Facilitiy loan Renewal_Option unit	Feb. 14, 2014 unit	Oct. 22, 2013 USD ($)	Jun. 30, 2015 USD ($) loan	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Facilitiy loan	Jun. 30, 2014 USD ($) Facilitiy	Jun. 30, 2015 CAD loan	Mar. 31, 2015 loan
Business Acquisition [Line Items]
Total revenues						$ 56,586	$ 42,973	$ 112,158	$ 83,823
Net income attributable to common stockholders						14,275	$ 12,241	31,164	$ 2,377
Purchase price					$ 119,800
Mortgages [Member]
Business Acquisition [Line Items]
Number of mortgage loans | loan											6
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Total revenues						700		700
Net income attributable to common stockholders						$ 700		700
Acquisition pursuit costs								$ 400
Canadian Portfolio [Member] | Mortgages [Member]
Business Acquisition [Line Items]
Expected annual lease revenue | CAD			CAD 11.9
Number of mortgage loans | loan	3		3			3		3		3
Outstanding principal amounts	$ 19,700		CAD 24.2			$ 19,700		$ 19,700		CAD 24.2
Canadian Portfolio [Member] | Senior Lifestyle Corporation [Member]
Business Acquisition [Line Items]
Master lease initial term		10 years	10 years
Number of lease renewal options | Renewal_Option		2	2
Lease renewal term		5 years	5 years
Annual rent increase in year two		4.00%	4.00%
Annual rent increase in year three		4.00%	4.00%
Rent increase during remainder of lease term		3.00%	3.00%
NMS Portfolio [Member]
Business Acquisition [Line Items]
Master lease initial term	15 years
Number of lease renewal options | Renewal_Option	2
Lease renewal term	10 years
Annual rent escalator	2.50%
Expected annual lease revenue	$ 18,300
NMS Portfolio [Member] | Maximum [Member]
Business Acquisition [Line Items]
Annual rent escalator	2.75%
Skilled Nursing Transitional Care Facilities [Member]
Business Acquisition [Line Items]
Number of acquired properties | unit				4
Skilled Nursing Transitional Care Facilities [Member] | Maryland [Member]
Business Acquisition [Line Items]
Number of acquired properties | skilled_nursing_bed	206
Purchase price	$ 58,800
Skilled Nursing Transitional Care Facilities [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Number of acquired properties | Facilitiy								3	6
Skilled Nursing Transitional Care Facilities [Member] | NMS Portfolio [Member] | Maryland [Member]
Business Acquisition [Line Items]
Number of acquired properties | Facilitiy	3
Purchase price	$ 175,200
Number of acquired beds | skilled_nursing_bed	472
Senior Housing Facilities [Member]
Business Acquisition [Line Items]
Number of acquired properties | unit				2
Senior Housing Facilities [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Number of acquired properties | Facilitiy								10	3
Senior Housing Facilities [Member] | Canadian Portfolio [Member] | British Columbia and Ontario, Canada [Member]
Business Acquisition [Line Items]
Number of acquired properties | Facilitiy		9	9
Number of acquired units | unit		865	865
Purchase price		$ 138,800	CAD 170.5
Tenant Origination and Absorption Costs [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets, weighted average amortization period as of date of acquisition								13 years
Tenant Relationship [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets, weighted average amortization period as of date of acquisition								22 years