Investments - Investments in Variable Interest Entities (Detail) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Maximum Exposure to Loss	$ 4,300,000	$ 4,500,000
Variable interest entity, not primary beneficiary
Variable Interest Entity [Line Items]
Investment	1,749,000	1,159,000
Maximum Exposure to Loss	$ 2,729,000	$ 2,139,000