VARIABLE INTEREST ENTITIES - VIEs Not Consolidated (Details) - Unconsolidated VIEs - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Maximum exposure to loss	$ 780,614	$ 1,477,519
Corporate investments
Variable Interest Entity [Line Items]
Maximum exposure to loss	693,090	1,093,294
Due from affiliates
Variable Interest Entity [Line Items]
Maximum exposure to loss	$ 87,524	$ 384,225

Difference between the carrying amount of assets and liabilities in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the variable interest entity (VIE) and the reporting entity's maximum exposure to loss as a result of its involvement with the VIE, where the reporting entity is not the VIE's primary beneficiary.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118582676&loc=d3e5728-111685

Name:	us-gaap_VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant