VARIABLE INTEREST ENTITIES (Schedule of Variable Interest Entities) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Orianna
Variable Interest Entity [Line Items]
Revenue total			$ 33,184
Orianna | Rental Income [Member]
Variable Interest Entity [Line Items]
Revenue total			2,401
Orianna | Financing Leases Income [Member]
Variable Interest Entity [Line Items]
Revenue total			29,877
Orianna | Investment Income [Member]
Variable Interest Entity [Line Items]
Revenue total			906
Agemo Holdings LLC
Variable Interest Entity [Line Items]
Revenue total	$ 65,141		67,171
Variable interest entity rental and other investment income		$ 56,800
Agemo Holdings LLC | Rental Income [Member]
Variable Interest Entity [Line Items]
Revenue total	60,639		62,287
Variable interest entity rental and other investment income	53,700		39,800
Agemo Holdings LLC | Investment Income [Member]
Variable Interest Entity [Line Items]
Revenue total	4,502		$ 4,884
Variable Interest Entity, Not Primary Beneficiary [Member] | Orianna
Variable Interest Entity [Line Items]
Assets subtotal		191,495
Maximum exposure to loss		15,242
Revenue total		3,477
Variable Interest Entity, Not Primary Beneficiary [Member] | Orianna | Investment Income [Member]
Variable Interest Entity [Line Items]
Revenue total		3,477
Variable Interest Entity, Not Primary Beneficiary [Member] | Orianna | Other Collateral [Member]
Variable Interest Entity [Line Items]
Liabilities subtotal		(176,253)
Variable Interest Entity, Not Primary Beneficiary [Member] | Orianna | Collateral Pledged [Member]
Variable Interest Entity [Line Items]
Liabilities subtotal		(176,253)
Variable Interest Entity, Not Primary Beneficiary [Member] | Orianna | Real Estate Investments [Member]
Variable Interest Entity [Line Items]
Assets subtotal		30,459
Variable Interest Entity, Not Primary Beneficiary [Member] | Orianna | Investments In Direct Financing Leases [Member]
Variable Interest Entity [Line Items]
Assets subtotal		120,545
Variable Interest Entity, Not Primary Beneficiary [Member] | Orianna | Other Investments [Member]
Variable Interest Entity [Line Items]
Assets subtotal		40,242
Variable Interest Entity, Not Primary Beneficiary [Member] | Orianna | Accounts Receivable [Member]
Variable Interest Entity [Line Items]
Assets subtotal		249
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC
Variable Interest Entity [Line Items]
Assets subtotal	533,246	514,267
Maximum exposure to loss	112,604	76,618
Revenue total		62,791
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC | Scenario, Plan [Member]
Variable Interest Entity [Line Items]
Contractual receivables, straight line rent receivable and lease inducements reserves	71,200
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC | Rental Income [Member]
Variable Interest Entity [Line Items]
Revenue total		59,291
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC | Investment Income [Member]
Variable Interest Entity [Line Items]
Revenue total		3,500
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC | Letters of credit
Variable Interest Entity [Line Items]
Liabilities subtotal	(9,253)	(9,253)
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC | Personal Guarantee Collateral [Member]
Variable Interest Entity [Line Items]
Liabilities subtotal	(8,000)	(15,000)
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC | Other Collateral [Member]
Variable Interest Entity [Line Items]
Liabilities subtotal	(403,389)	(413,396)
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC | Collateral Pledged [Member]
Variable Interest Entity [Line Items]
Liabilities subtotal	(420,642)	(437,649)
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC | Real Estate Investments [Member]
Variable Interest Entity [Line Items]
Assets subtotal	403,389	413,396
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC | Other Investments [Member]
Variable Interest Entity [Line Items]
Assets subtotal	58,687	46,287
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC | Accounts Receivable [Member]
Variable Interest Entity [Line Items]
Assets subtotal	18,113	18,017
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC | Straight-Line Rent Receivables [Member]
Variable Interest Entity [Line Items]
Assets subtotal	46,247	34,203
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC | Lease inducement [Member]
Variable Interest Entity [Line Items]
Assets subtotal	$ 6,810	2,362
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC | Above market leases
Variable Interest Entity [Line Items]
Assets subtotal		$ 2