EQUITY SECURITIES PORTFOLIO INVESTMENT - Narrative (Details) £ in Thousands, $ in Thousands			12 Months Ended
	Apr. 03, 2020 USD ($)	Apr. 03, 2020 GBP (£)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jul. 31, 2022 USD ($)	Apr. 30, 2022 USD ($)	Oct. 13, 2021 USD ($)	Oct. 13, 2021 GBP (£)	Dec. 03, 2020
Offsetting Liabilities [Line Items]
Fair value of investment			$ 61,608	$ 361,778
Earnings on equity investment in joint venture			42,531	3,530
Net (loss) income including noncontrolling interests in subsidiaries			(125,065)	149,197
Net income attributable to noncontrolling interests in subsidiaries			14,126	1,168
Notes receivable, related parties							$ 4,000	£ 2,950
Interest income, other			291	69
MalinJ1
Offsetting Liabilities [Line Items]
Milestone payment			1,800			$ 40,000
Deferred milestone payment					$ 1,200	$ 27,200
Interest accrual percentage						8.50%
Arix
Offsetting Liabilities [Line Items]
Fair value of investment			$ 42,700
Arix | Arix
Offsetting Liabilities [Line Items]
Equity method investment ownership			26.00%
MalinJ1
Offsetting Liabilities [Line Items]
Ownership percentage									63.90%
Earnings on equity investment in joint venture			$ 42,500	3,500
Net (loss) income including noncontrolling interests in subsidiaries			28,400	2,400
Net income attributable to noncontrolling interests in subsidiaries			$ 14,100	1,200
MalinJ1 | MalinJ1
Offsetting Liabilities [Line Items]
Equity method investment ownership			41.00%
Equity Securities
Offsetting Liabilities [Line Items]
Investment at fair value			$ 68,400	$ 343,100
Option Agreement | Portfolio Companies
Offsetting Liabilities [Line Items]
Payments to acquire investments	$ 277,500	£ 223,900