INVESTMENTS - Equity Method Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Investments [Abstract]
Total Assets	$ 112,688,482	$ 93,577,773
Total Liabilities	22,622,609	21,296,194
Total Equity	90,065,873	72,281,579
Investment Related Revenues	2,552,266	1,679,950	$ 1,167,038
Other Revenues	5,132,796	5,304,634	3,002,987
Investment Related Expenses	1,385,870	1,258,782	482,336
Other Expenses	4,066,713	3,602,612	2,392,965
Net Realized and Unrealized Gain/(Loss) from Investments	10,532,988	1,818,861	9,217,912
Net Income (Loss)	$ 12,765,467	$ 3,942,051	$ 10,512,636