Investments - Strategic Investments Activity (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Increase (Decrease) In Strategic Investments [Roll Forward]
Beginning balance	$ 11,527	$ 11,043
Interest accrued on available-for-sale debt securities	2	2
Purchases of strategic investments	210	149
Unrealized gain on strategic investments	759	36
Ending balance	12,498	11,230
Limited Partnerships
Increase (Decrease) In Strategic Investments [Roll Forward]
Beginning balance	3,986	3,402
Interest accrued on available-for-sale debt securities	0	0
Purchases of strategic investments	210	149
Unrealized gain on strategic investments	88	37
Ending balance	4,284	3,588
Investments in available-for-sale debt securities
Increase (Decrease) In Strategic Investments [Roll Forward]
Beginning balance	362	355
Interest accrued on available-for-sale debt securities	2	2
Purchases of strategic investments	0	0
Unrealized gain on strategic investments	0	0
Ending balance	364	357
Equity Securities
Increase (Decrease) In Strategic Investments [Roll Forward]
Beginning balance	7,179	7,286
Interest accrued on available-for-sale debt securities	0	0
Purchases of strategic investments	0	0
Unrealized gain on strategic investments	671	(1)
Ending balance	$ 7,850	$ 7,285