Interest and Other Investment Income (Loss), Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest and Other Income [Abstract]
Interest on loans receivable	$ 2,517	$ 3,384	$ 6,326
Interest on cash and cash equivalents and restricted cash	284	5,793	13,380
Credit losses on loans receivable	0	(13,369)	0
Market-to-market decrease in the fair value of marketable security (sold on January 23, 2020)	0	(4,938)	(5,533)
Dividends on marketable securities	0	0	3,938
Other, net	1,811	3,631	3,708
Interest and other investment income, net	$ 4,612	$ (5,499)	$ 21,819