Investments (Gain (Loss) on Marketable Equity Securities) (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Investments [Abstract]
Gain (loss) on marketable equity securities, net	$ 78,648	$ (165,540)	$ 96,670	$ (118,628)
Less: Net (gains) losses in earnings from marketable equity securities sold and donated	(9,132)	4,838	(5,475)	10,605
Net unrealized gains (losses) in earnings from marketable equity securities still held at the end of the period	$ 69,516	$ (160,702)	$ 91,195	$ (108,023)