MORTGAGE NOTES RECEIVABLE (Schedule of Receivables) (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) contract property	Dec. 31, 2017 USD ($) contract	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jan. 17, 2014 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage notes receivable, gross	$ 715,763	$ 676,137
Allowance for loss on mortgage notes receivable	(4,905)	(4,905)
Total mortgages - net	710,858	671,232	$ 639,343	$ 679,795
Mortgage Note Due 2027 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage notes receivable, gross	$ 112,500	112,500			$ 112,500
Mortgage loans on real estate, interest rate	10.18%
Maturity year	2027
Mortgage Note Due 2029 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage notes receivable, gross	$ 537,515	476,320
Mortgage loans on real estate, interest rate	9.87%
Maturity year	2029
Number of facilities used in weighted average interest rate | property	39
Other Mortgage Notes Member
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage notes receivable, gross	$ 65,748	87,317
Mortgage loans on real estate, interest rate	11.25%
Minimum | Other Mortgage Notes Member
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity year	2019
Maximum | Other Mortgage Notes Member
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity year	2028
Commercial Borrower [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage notes receivable, gross	$ 1,500	$ 1,500
Mortgage loans on real estate, number of loans | contract	1	1
Construction Loans [Member] | Mortgage Note Due 2029 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage notes receivable, gross	$ 20,500
Maturity year	2029
Mortgage loans on real estate, number of loans | contract	2
Construction Loans [Member] | Other Mortgage Notes Member
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity year	2019