INVESTMENTS - Equity-method Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statements of Operations
Interest expense	$ (39,191)	$ (36,876)
Net realized and unrealized gain on investments	39,134	59,912
Net income (loss)	113,623	503,281
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Statements of Operations
Revenues / investment income	840,605	413,311
Interest expense	(54,290)	(38,941)
Other expenses	(220,991)	(199,258)
Net realized and unrealized gain on investments	986,800	4,336,081
Net income (loss)	$ 1,552,124	$ 4,511,193
Maximum
Schedule of Equity Method Investments [Line Items]
Ownership percentage	2.50%