Investments - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Schedule of Investments [Line Items]
Equity method investments	$ 36,100		$ 36,100		$ 32,800
Gains (losses) on equity method investments	3,230	$ 1,816	8,762	$ 4,605
Impairment charge on equity method investments	0	0	0	0
Equity method investment, amount sold	0	0	0	3,800
Equity investments carried under measurement alternative	200		200		200
Equity investments carried under measurement alternative, impairment			0
Equity investments carried under measurement alternative, loss	0			0
Equity investments carried under measurement alternative, gain		0
Total assets	4,671,086		4,671,086		3,342,166
Total liabilities	3,943,757		3,943,757		2,660,090
Maximum Exposure to Loss	4,400		4,400		4,500
Other nonoperating income (expense)
Schedule of Investments [Line Items]
Equity investments carried under measurement alternative, loss	0	$ 200	1,900	$ 100
Variable interest entity, primary beneficiary
Schedule of Investments [Line Items]
Total assets	7,500		7,500		6,800
Total liabilities	$ 1,700		$ 1,700		$ 1,300