SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Non-controlling Redeemable Interests in Consolidated Funds (Details)	12 Months Ended
Dec. 31, 2020
Minimum
Variable Interest Entity [Line Items]
Withdrawal period	1 month
Maximum
Variable Interest Entity [Line Items]
Withdrawal period	3 years

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration