Investments - Narrative (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Schedule of Investments [Line Items]
Equity method investments	$ 40,762		$ 40,762		$ 38,122
Gains (losses) on equity method investments	2,744	$ 2,412	4,534	$ 4,474
Investments carried under measurement alternative	192		192		192
Total assets	4,259,195		4,259,195		3,175,937
Total liabilities	3,217,325		3,217,325		2,277,781
Maximum Exposure to Loss	5,500		5,500		5,700
Other nonoperating income (expense)
Schedule of Investments [Line Items]
Equity investments carried under measurement alternative, gain		$ 0	36,700
Equity investments carried under measurement alternative, loss	0			$ (1,300)
Variable interest entity, primary beneficiary
Schedule of Investments [Line Items]
Total assets	9,000		9,000		9,500
Total liabilities	$ 1,000		$ 1,000		$ 1,200