Investments - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Investments [Line Items]
Equity method investments	$ 38,122,000	$ 38,383,000
Gains (losses) on equity method investments	9,152,000	10,920,000	$ 6,706,000
Impairment charge on equity method investments	0	0	0
Equity method investment, amount sold	0	0	3,800,000
Investments carried under measurement alternative	192,000	192,000
Equity investments carried under measurement alternative, loss	0	0	0
Equity investments carried under measurement alternative, gain	0	0	0
Impairments related to investments	0	0	0
Assets	3,175,937,000	3,074,971,000
Liabilities	2,277,781,000	2,326,244,000
Maximum Exposure to Loss	5,700,000	5,500,000
Other Nonoperating Income (Expense)
Schedule of Investments [Line Items]
Equity investments carried under measurement alternative, loss			$ 100,000
Equity investments carried under measurement alternative, gain	(1,900,000)	(1,800,000)
Variable Interest Entity, Primary Beneficiary
Schedule of Investments [Line Items]
Assets	9,500,000	9,200,000
Liabilities	$ 1,200,000	$ 1,400,000