Fair Value Measurements and Marketable Equity Securities - Schedule of Portion of Unrealized Gains and Losses Relate to Marketable Equity Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Gain (Loss) on Securities [Line Items]
Net (gain) loss during the period on marketable equity securities	$ (37,812)	$ 3,705	$ (6,007)	$ (2,541)
Less: Net gain recognized during the period on marketable equity securities sold during the period	0	0	(3,264)	(6,081)
Unrealized (gain) loss recognized during the period on marketable equity securities still held at the reporting date	$ (37,812)	$ 3,705	$ (2,743)	$ 3,540