OTHER INVESTMENTS (Note Due 2019 Narrative) (Detail) $ in Thousands	Sep. 28, 2018 USD ($) property	Dec. 31, 2019 property	Dec. 31, 2019 USD ($)	Dec. 31, 2019 facility	May 31, 2019 facility	Dec. 31, 2018 USD ($)
Schedule of Investments [Line Items]
Number of real estate properties | facility				987
Other investments | $			$ 419,228			$ 504,626
Assisted Living Facilities
Schedule of Investments [Line Items]
Number of real estate properties | facility				114
Skill Nursing Facilities Leases [Member]
Schedule of Investments [Line Items]
Number of real estate properties		782		784
Other Investment Note Due 2019 [Member]
Schedule of Investments [Line Items]
Other investments, gross | $						$ 131,452
Other Investment Note Due 2019 [Member] | 7 SNFs, 3 Independent Living Facilities and 1 ALF
Schedule of Investments [Line Items]
Investment Maturity Date	May 31, 2019
Financing receivable, face amount | $	$ 131,300
Loans receivable fixed rate	9.35%
Investment maturity date	May 31, 2019
Origination costs | $	$ 400
Facilities Acquired [Member] | Other Investment Note Due 2019 [Member] | Pennsylvania
Schedule of Investments [Line Items]
Number of real estate properties | facility					9
Facilities Acquired [Member] | Other Investment Note Due 2019 [Member] | Virginia
Schedule of Investments [Line Items]
Number of real estate properties | facility					2
Facilities Covered by Mortgage and Used as Collateral [Member] | Other Investment Note Due 2019 [Member] | Assisted Living Facilities
Schedule of Investments [Line Items]
Number of real estate properties | property	1
Facilities Covered by Mortgage and Used as Collateral [Member] | Other Investment Note Due 2019 [Member] | Skill Nursing Facilities Leases [Member]
Schedule of Investments [Line Items]
Number of real estate properties | property	7
Facilities Covered by Mortgage and Used as Collateral [Member] | Other Investment Note Due 2019 [Member] | Independent Living Facilities [Member]
Schedule of Investments [Line Items]
Number of real estate properties | property	3