VARIABLE INTEREST ENTITIES (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Agemo Holdings LLC [Member] | Rental Income [Member]
Variable Interest Entity [Line Items]
Variable interest entity rental and other investment income	$ 56,800	$ 39,800
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	33,184
Variable Interest Entity, Not Primary Beneficiary [Member] | Orianna | Rental Income [Member]
Variable Interest Entity [Line Items]
Revenue total		2,401
Variable Interest Entity, Not Primary Beneficiary [Member] | Orianna | Financing Leases Income [Member]
Variable Interest Entity [Line Items]
Revenue total		29,877
Variable Interest Entity, Not Primary Beneficiary [Member] | Orianna | Investment Income [Member]
Variable Interest Entity [Line Items]
Revenue total	3,477	906
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 [Member]
Variable Interest Entity [Line Items]
Assets subtotal	514,267
Maximum exposure to loss	76,618
Revenue total	62,791	67,171
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC [Member] | Rental Income [Member]
Variable Interest Entity [Line Items]
Revenue total	59,291	62,287
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC [Member] | Investment Income [Member]
Variable Interest Entity [Line Items]
Revenue total	3,500	$ 4,884
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC [Member] | Letters of credit
Variable Interest Entity [Line Items]
Liabilities subtotal	(9,253)
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC [Member] | Personal Guarantee Collateral [Member]
Variable Interest Entity [Line Items]
Liabilities subtotal	(15,000)
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC [Member] | Other Collateral [Member]
Variable Interest Entity [Line Items]
Liabilities subtotal	(413,396)
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC [Member] | Collateral Pledged [Member]
Variable Interest Entity [Line Items]
Liabilities subtotal	(437,649)
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC [Member] | Real Estate Investments [Member]
Variable Interest Entity [Line Items]
Assets subtotal	413,396
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC [Member] | Other Investments [Member]
Variable Interest Entity [Line Items]
Assets subtotal	46,287
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC [Member] | Accounts Receivable [Member]
Variable Interest Entity [Line Items]
Assets subtotal	18,017
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC [Member] | Straight-Line Rent Receivables [Member]
Variable Interest Entity [Line Items]
Assets subtotal	34,203
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC [Member] | Lease inducement [Member]
Variable Interest Entity [Line Items]
Assets subtotal	2,362
Variable Interest Entity, Not Primary Beneficiary [Member] | Agemo Holdings LLC [Member] | Above market leases
Variable Interest Entity [Line Items]
Assets subtotal	$ 2