SUBSEQUENT EVENTS - Narrative (Details)					6 Months Ended
	Aug. 01, 2016 $ / shares	Jul. 29, 2016 Facilitiy	May 02, 2016 $ / shares	Feb. 03, 2016 $ / shares	Jun. 30, 2016 Facilitiy $ / shares	Jun. 30, 2015 $ / shares	Sep. 30, 2016 Facilitiy
Subsequent Event [Line Items]
Common dividends, declared (in dollars per share) | $ / shares			$ 0.42	$ 0.41	$ 0.83	$ 0.78
Genesis [Member]
Subsequent Event [Line Items]
Number of leased facilities | Facilitiy					78
Percent of leases maturing in the next five years					77.00%
Genesis [Member] | Forecast [Member]
Subsequent Event [Line Items]
Reduction to rent received, percent of proceeds on sale							7.50%
Number of leased facilities | Facilitiy							43
Percent of leases maturing in the next five years							30.00%
Subsequent Event [Member] | Genesis [Member]
Subsequent Event [Line Items]
Number of properties disposed of | Facilitiy		29
Subsequent Event [Member] | Dividend Declared [Member]
Subsequent Event [Line Items]
Common dividends, declared (in dollars per share) | $ / shares	$ 0.42
Preferred stock dividends, declared (in dollars per share) | $ / shares	$ 0.4453125