MORTGAGE NOTES RECEIVABLE (Narrative) (Detail)	12 Months Ended
	Dec. 31, 2021 property facility state entity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of real estate properties	960
Number of states | state	42
Skilled Nursing Facilities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of real estate properties	685
Assisted Living Facilities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of real estate properties	133
Facilities Under Fixed Rate Mortgage Loans [Member] | Skilled Nursing Facilities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of real estate properties	59
Facilities Under Fixed Rate Mortgage Loans [Member] | Assisted Living Facilities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of real estate properties	2
Mortgage Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of fixed rate mortgage | property	7
Number of states | state	6
Number of independent healthcare operating companies operating under mortgage notes receivable | entity	6
Mortgage Receivable [Member] | Facilities Considered Long Term [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of real estate properties | property	63