REAL ESTATE PROPERTIES HELD FOR INVESTMENT - Narrative (Details)			3 Months Ended		9 Months Ended
	Feb. 14, 2014 USD ($) unit	Oct. 22, 2013 USD ($) unit	Sep. 30, 2015 USD ($) Customer	Jun. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Customer	Sep. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Real Estate Properties [Line Items]
Number of acquired properties, payments	$ 90,000,000
Contingent consideration liability	$ 3,200,000	$ 7,300,000	$ 4,200,000		$ 4,200,000
Change in fair value of contingent consideration			100,000		300,000	$ (860,000)
Purchase price		119,800,000
Purchase price held in escrow		$ 10,500,000
Purchase price held in escrow, period		20 months
Annual fee during escrow period		$ 500,000
Amount released from escrow				$ 5,300,000
Amount held in escrow			8,239,000		8,239,000		$ 5,200,000	$ 7,024,000
Amount remaining in escrow							$ 5,200,000
Adjustment to contingent consideration liability					$ 0
Weighted average lease expiration period					10 years
Security deposit liability			1,200,000		$ 1,200,000			400,000
Reserve for unpaid cash rents			2,300,000		2,300,000			0
Allowance For Straight Line Rent			$ 4,900,000		$ 4,900,000			$ 600,000
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Real Estate Properties [Line Items]
Number of major customers | Customer			2		2
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Genesis [Member]
Real Estate Properties [Line Items]
Concentration risk percent					32.80%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Holiday [Member]
Real Estate Properties [Line Items]
Concentration risk percent					16.20%
Minimum [Member]
Real Estate Properties [Line Items]
Lease expiration period					2 years
Maximum [Member]
Real Estate Properties [Line Items]
Lease expiration period					17 years
Skilled Nursing Transitional Care Facilities [Member]
Real Estate Properties [Line Items]
Number of acquired properties | unit	4
Senior Housing Facilities [Member]
Real Estate Properties [Line Items]
Number of acquired properties | unit	2
Acute Care Hospital [Member]
Real Estate Properties [Line Items]
Number of acquired properties | unit		1