FAIR VALUE - Consolidated Funds Summary of Valuation Techniques and Quantitative Information (Details) - Consolidated Funds $ in Thousands	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate investments, at fair value	$ 88,675	$ 74,471
Investments, at fair value	4,527,442	3,908,613
Level III
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investments, at fair value	2,956,992	2,390,273
Level III | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate investments, at fair value	88,675	66,776
Level III | Recent transaction price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate investments, at fair value		7,695
Level III | Consumer discretionary | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	93,250	16,062
Level III | Consumer discretionary | Recent market information
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	319	293
Level III | Consumer discretionary | Recent transaction price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	40,371	43,934
Level III | Communication services | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value		67,500
Level III | Energy | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	31,133	32,765
Level III | Energy | Recent market information
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	2,429	2,676
Level III | Energy | Recent transaction price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	104,180
Level III | Financials | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	26,663	66,204
Level III | Financials | Recent market information
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	13,609	12,880
Level III | Financials | Recent transaction price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value		6,143
Level III | Financials | Market approach (comparable companies)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	56,207
Level III | Industrials | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	45,682	9,875
Level III | Industrials | Recent market information
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value		35,124
Level III | Industrials | Recent transaction price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	26,185	4,527
Level III | Industrials | Market approach (comparable companies)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	35,540
Level III | Information technology | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	53,328
Level III | Information technology | Recent market information
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	(91)
Level III | Information technology | Recent transaction price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	41,252
Level III | Materials | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	250,276	197,427
Level III | Real estate | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	6,422	3,643
Level III | Real estate | Recent market information
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	42,372	35,525
Level III | Real estate | Recent transaction price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	116,171	32,173
Level III | Real estate | Market approach (comparable companies)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	323,389	302,179
Level III | Other | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	110,114
Level III | Other | Recent market information
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	(1,379)	(1,137)
Level III | Other | Recent transaction price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	2,921	22,732
Level III | Other | Market approach (comparable companies)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, at fair value	19,615	31,474
Level III | Equity investments: | Discounted cash flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, at fair value	229,470	214,172
Level III | Equity investments: | Recent market information
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, at fair value	31,169	75,181
Level III | Equity investments: | Recent transaction price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, at fair value	93,182	74,329
Level III | Equity investments: | Discounted cash flow / Market approach (comparable companies)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, at fair value	29,483	27,347
Level III | Equity investments: | Market approach (comparable companies)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, at fair value	$ 577,934	$ 582,299
Discount rate | Level III | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	0.18	0.14
Discount rate | Level III | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	0.27	0.25
Discount rate | Level III | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	0.21	0.18
Discount rate | Level III | Consumer discretionary | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.13	0.12
Discount rate | Level III | Consumer discretionary | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.16	0.15
Discount rate | Level III | Consumer discretionary | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.14	0.14
Discount rate | Level III | Communication services | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs		0.12
Discount rate | Level III | Communication services | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs		0.13
Discount rate | Level III | Communication services | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs		13
Discount rate | Level III | Energy | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.14	0.13
Discount rate | Level III | Energy | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.19	0.21
Discount rate | Level III | Energy | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.17	0.18
Discount rate | Level III | Financials | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.12	0.12
Discount rate | Level III | Financials | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.15	0.19
Discount rate | Level III | Financials | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.15	0.15
Discount rate | Level III | Industrials | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.12	0.12
Discount rate | Level III | Industrials | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.16	0.15
Discount rate | Level III | Industrials | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.13	0.14
Discount rate | Level III | Information technology | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.12
Discount rate | Level III | Information technology | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.15
Discount rate | Level III | Information technology | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.13
Discount rate | Level III | Materials | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.10	0.10
Discount rate | Level III | Materials | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.15	0.14
Discount rate | Level III | Materials | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.12	0.12
Discount rate | Level III | Real estate | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs		0.09
Discount rate | Level III | Real estate | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs		0.09
Discount rate | Level III | Real estate | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs		9
Discount rate | Level III | Other | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.11	0.10
Discount rate | Level III | Other | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.18	0.18
Discount rate | Level III | Other | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.13	14
Discount rate | Level III | Equity investments: | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	0.12	0.12
Discount rate | Level III | Equity investments: | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	0.21	0.21
Discount rate | Level III | Equity investments: | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	0.19	0.19
Discount rate | Level III | Equity investments: | Discounted cash flow / Market approach (comparable companies) | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	0.13	0.14
Discount rate | Level III | Equity investments: | Discounted cash flow / Market approach (comparable companies) | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	0.13	0.14
Discount rate | Level III | Equity investments: | Discounted cash flow / Market approach (comparable companies) | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	0.13	14
Revenue multiple | Level III | Equity investments: | Market approach (comparable companies)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, at fair value	$ 75,163	$ 83,644
Revenue multiple | Level III | Equity investments: | Market approach (comparable companies) | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	2.0	1
Revenue multiple | Level III | Equity investments: | Market approach (comparable companies) | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	5.0	2
Revenue multiple | Level III | Equity investments: | Market approach (comparable companies) | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	3.3	2
Multiple of underlying assets | Level III | Financials | Market approach (comparable companies) | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.5	0.9
Multiple of underlying assets | Level III | Financials | Market approach (comparable companies) | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	1	1.0
Multiple of underlying assets | Level III | Financials | Market approach (comparable companies) | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.95	1
Multiple of underlying assets | Level III | Industrials | Market approach (comparable companies) | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.9	0.9
Multiple of underlying assets | Level III | Industrials | Market approach (comparable companies) | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	1.1	1.0
Multiple of underlying assets | Level III | Industrials | Market approach (comparable companies) | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	1.0	1.0
Multiple of underlying assets | Level III | Real estate | Discounted cash flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.09
Multiple of underlying assets | Level III | Real estate | Discounted cash flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.09
Multiple of underlying assets | Level III | Real estate | Discounted cash flow | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	9
Multiple of underlying assets | Level III | Real estate | Market approach (comparable companies) | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.4	0.8
Multiple of underlying assets | Level III | Real estate | Market approach (comparable companies) | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	1	1.0
Multiple of underlying assets | Level III | Real estate | Market approach (comparable companies) | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit-oriented investments, measurement inputs	0.9	0.95
Multiple of underlying assets | Level III | Equity investments: | Recent market information | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	0.9
Multiple of underlying assets | Level III | Equity investments: | Recent market information | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	1.1
Multiple of underlying assets | Level III | Equity investments: | Recent market information | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	1.0
Multiple of underlying assets | Level III | Equity investments: | Market approach (comparable companies) | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs		0.9
Multiple of underlying assets | Level III | Equity investments: | Market approach (comparable companies) | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs		1.1
Multiple of underlying assets | Level III | Equity investments: | Market approach (comparable companies) | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs		1.0
Earning Multiple | Level III | Other | Market approach (comparable companies) | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	5
Earning Multiple | Level III | Other | Market approach (comparable companies) | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	5
Earning Multiple | Level III | Other | Market approach (comparable companies) | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	5
Earning Multiple | Level III | Equity investments: | Discounted cash flow / Market approach (comparable companies) | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	7.0
Earning Multiple | Level III | Equity investments: | Discounted cash flow / Market approach (comparable companies) | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	9.0
Earning Multiple | Level III | Equity investments: | Discounted cash flow / Market approach (comparable companies) | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	8.0
Earning Multiple | Level III | Equity investments: | Market approach (comparable companies)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, at fair value	$ 391,958	$ 336,831
Earning Multiple | Level III | Equity investments: | Market approach (comparable companies) | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	5.0	5
Earning Multiple | Level III | Equity investments: | Market approach (comparable companies) | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	10.0	20
Earning Multiple | Level III | Equity investments: | Market approach (comparable companies) | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity investments, measurement inputs	7.7	9