INCOME TAXES (Details) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended	24 Months Ended
	Mar. 27, 2020 USD ($)	Jun. 30, 2020 USD ($) facility	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) facility	Jun. 30, 2019 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 USD ($)
Income Tax Disclosure [Abstract]
Income tax expense		$ 182	$ 17,312	$ 78	$ 16,285
Contingent liability expense							$ 9,500
Tax Act, income tax expense related to revaluation of deferred tax assets						$ 5,500
Number of nursing center facilities terminated | facility		10		10
Deferred tax asset, valuation allowance		$ 21,300	$ 20,000	$ 21,300	$ 20,000
CARES Act, tax refund received	$ 321