Investments - Investments in Variable Interest Entities (Detail) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Maximum Exposure to Loss	$ 5,500,000	$ 5,700,000
Receivables from related parties	1,557,000	2,717,000
Variable interest entity, not primary beneficiary
Variable Interest Entity [Line Items]
Investment	2,100,000	2,857,000
Maximum Exposure to Loss	$ 2,100,000	$ 2,857,000