REAL ESTATE PROPERTIES HELD FOR INVESTMENT - Narrative (Details)			3 Months Ended
	Apr. 01, 2017 Property Facilitiy	Mar. 01, 2017 Property	Mar. 31, 2017 USD ($) Property acquisition Facilitiy	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Real Estate Properties [Line Items]
Payment of contingent consideration			$ 0
Facilities transitioned to managed property structure | Property		8	8
Change in fair value of contingent consideration			$ 822,000	$ 0
Weighted average lease expiration period			9 years
Security deposit liability			$ 2,000,000		$ 2,700,000
Reserve for unpaid cash rents			3,300,000		3,200,000
Allowance for straight-line rental income			$ 1,900,000		$ 3,700,000
Genesis [Member]
Real Estate Properties [Line Items]
Memoranda of understanding facilities | Facilitiy			35
Number of leased facilities | Facilitiy			43
Genesis [Member]
Real Estate Properties [Line Items]
Number of Investments | Facilitiy			78
Minimum [Member]
Real Estate Properties [Line Items]
Lease expiration period			1 year
Maximum [Member]
Real Estate Properties [Line Items]
Lease expiration period			16 years
Acquisitions With Contingent Consideration Arrangements [Member]
Real Estate Properties [Line Items]
Number of acquired properties | acquisition			3
Estimated earn-out value			$ 3,200,000
Acquisitions With Contingent Consideration Arrangements [Member] | Accounts Payable and Accrued Liabilities [Member]
Real Estate Properties [Line Items]
Contingent consideration liability			0
Acquisitions With Contingent Consideration Arrangements [Member] | Other Operating Income (Expense) [Member]
Real Estate Properties [Line Items]
Change in fair value of contingent consideration			$ 818,000
Subsequent Event [Member] | Genesis [Member]
Real Estate Properties [Line Items]
Memoranda of understanding facilities | Facilitiy	34
Number of facilities sold | Property	1
Non Triple-net Operating Leases [Member]
Real Estate Properties [Line Items]
Number of Investments | Property			10