Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 4,278	$ (47,686)	$ 133,414	$ (82,126)
Changes in market value of investments, net of tax:
Unrealized gain (loss) on marketable securities	216	(746)	1,699	(2,752)
Comprehensive income (loss)	$ 4,494	$ (48,432)	$ 135,113	$ (84,878)