Investments (Equity Method Investments, Statement of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investments [Abstract]
Total Revenue	$ 3,465,807	$ 11,062,060	$ 11,031,051
Total Expenses	(979,287)	(1,655,673)	(2,044,942)
Net earnings (losses)	2,486,520	9,406,387	8,986,109
Earnings in net earnings (losses) included above	17,795	(36,513)	62,173
Equity in net earnings (losses) of LP/LLC interests not included above	11,792	7,320	28,765
Total equity in net earnings (losses)	$ 29,587	$ (29,193)	$ 90,938