ASSET HELD FOR SALE DISPOSITIONS (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) Facilitiy	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) Facilitiy	Jun. 30, 2017 USD ($) Facilitiy	Jul. 02, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Real estate impairment	$ 881	$ 0	$ 1,413	$ 0
Skilled Nursing Transitional Care Facilities | Assets Held for Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of facilities held for sale | Facilitiy	1		1
Carrying value of assets and liabilities of facility	$ 6,000		$ 6,000
Skilled Nursing Transitional Care Facilities | Assets Held for Sale | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate sale price of facility					$ 7,000
2018 Dispositions | Dispositions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Carrying value of assets and liabilities of facility	135,800		135,800
Aggregate sale price of facility	$ 278,300		278,300
Net gain on sale			$ 142,500
2018 Dispositions | Skilled Nursing Transitional Care Facilities | Dispositions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of facilities sold | Facilitiy			33
Net income from facilities			$ 11,600	$ 15,400
2018 Dispositions | Senior Housing Facilities | Dispositions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of facilities sold | Facilitiy			4
Real estate impairment			$ 500
Number of facilities sold with related impairment | Facilitiy			1
2017 Disposition | Dispositions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of facilities sold | Facilitiy				1
Carrying value of assets and liabilities of facility		2,100		$ 2,100
Aggregate sale price of facility		$ 6,100		6,100
Net gain on sale				4,000
Selling expenses			$ 100
2017 Disposition | Skilled Nursing Transitional Care Facilities | Dispositions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income from facilities				$ 100