SUBSEQUENT EVENTS - Enlivant Joint Ventures (Details) - Subsequent Event $ in Millions	Jan. 02, 2018 USD ($) Property director
Enlivant Joint Venture
Business Acquisition [Line Items]
Number of properties \| Property	172
Enlivant Joint Venture
Business Acquisition [Line Items]
Ownership interest	49.00%
Purchase price of equity method investment	$ 352.7
Aggregate portfolio value	1,490.0
Portfolio indebtedness	791.3
Net working capital	$ 22.9
Number of directors appointed by minority interest \| director	3
Total number of directors \| director	7
Enlivant
Business Acquisition [Line Items]
Number of housing communities acquired \| Property	11
Purchases of housing communities	$ 138.3
Net working capital	$ 14.1

Equity Method Investment, Summarized Financial Information, Net Working Capital

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