EQUITY SECURITIES PORTFOLIO INVESTMENT - Narrative (Details) $ in Thousands, £ in Millions			3 Months Ended		9 Months Ended
	Apr. 03, 2020 USD ($)	Apr. 03, 2020 GBP (£)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 03, 2020
Offsetting Liabilities [Line Items]
Fair value of investment			$ 64,511		$ 64,511		$ 61,608
Earnings on equity investment in joint venture			3,375	$ 850	3,375	$ 42,935
Net (loss) income including noncontrolling interests in subsidiaries			1,636	28,090	(7,696)	(106,679)
Net income attributable to noncontrolling interests in subsidiaries			1,126	306	1,126	14,319
Interest income, other			0	$ 70	146	221
Acacia
Offsetting Liabilities [Line Items]
Distributions received					2,200	1,200
Noncontrolling Interests
Offsetting Liabilities [Line Items]
Distributions received					1,100	586
Arix
Offsetting Liabilities [Line Items]
Fair value of investment			$ 50,400		$ 50,400
Arix | Arix
Offsetting Liabilities [Line Items]
Equity method investment ownership			26.00%		26.00%
MalinJ1
Offsetting Liabilities [Line Items]
Ownership percentage								63.90%
Earnings on equity investment in joint venture					$ 3,400	$ 42,900
MalinJ1 | MalinJ1
Offsetting Liabilities [Line Items]
Equity method investment ownership			41.00%		41.00%
Equity Securities
Offsetting Liabilities [Line Items]
Investment at fair value			$ 76,100		$ 76,100		$ 68,400
Option Agreement | Portfolio Companies
Offsetting Liabilities [Line Items]
Payments to acquire investments	$ 277,500	£ 223.9