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Investments - Investments in Variable Interest Entities (Detail) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Maximum Exposure to Loss	$ 4,400,000	$ 4,500,000
Receivables from related parties	6,276,000	5,237,000
Aqua
Variable Interest Entity [Line Items]
Receivables from related parties	980,000
Aqua | Subordinated loan
Variable Interest Entity [Line Items]
Maximum Exposure to Loss	980,000
Receivables from related parties	980,000
Variable interest entity, not primary beneficiary
Variable Interest Entity [Line Items]
Investment	2,327,000	1,159,000
Maximum Exposure to Loss	$ 3,307,000	$ 2,139,000

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