Investments - Strategic Investments Activity (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Debt Securities, Available-for-Sale [Line Items]
Beginning balance	$ 11,043	$ 7,332
Interest accrued on available-for-sale debt securities	2	101
Purchases of strategic investments	149	2,329
Conversion of available-for-sale debt securities into equity securities		0
Unrealized (loss) gain on strategic investments	36	42
Ending balance	11,230	9,804
Equity Securities
Debt Securities, Available-for-Sale [Line Items]
Beginning balance	7,286	3,882
Interest accrued on available-for-sale debt securities	0	0
Purchases of strategic investments	0	0
Conversion of available-for-sale debt securities into equity securities		3,292
Unrealized (loss) gain on strategic investments	(1)	0
Ending balance	7,285	7,174
Limited Partnerships
Debt Securities, Available-for-Sale [Line Items]
Beginning balance	3,402	0
Interest accrued on available-for-sale debt securities	0	0
Purchases of strategic investments	149	2,329
Conversion of available-for-sale debt securities into equity securities		0
Unrealized (loss) gain on strategic investments	37	0
Ending balance	3,588	2,329
Investments in available-for-sale debt securities
Debt Securities, Available-for-Sale [Line Items]
Beginning balance	355	3,450
Interest accrued on available-for-sale debt securities	2	101
Purchases of strategic investments	0	0
Conversion of available-for-sale debt securities into equity securities		(3,292)
Unrealized (loss) gain on strategic investments	0	42
Ending balance	$ 357	$ 301