Investments - Investments in Variable Interest Entities (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Maximum Exposure to Loss	$ 5,700,000	$ 5,500,000
Receivables from related parties	2,717,000	1,444,000
Aqua | Subordinated Loan
Variable Interest Entity [Line Items]
Maximum Exposure to Loss		600,000
Receivables from related parties	1,000,000
Cash proceeds from subordinated loan receivable	400,000
Variable Interest Entities
Variable Interest Entity [Line Items]
Investment	2,857,000	2,530,000
Maximum Exposure to Loss	$ 2,857,000	$ 2,959,000