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Investments - Investments in Variable Interest Entities Table Footnote (Detail) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Receivables from related parties	$ 6,398,000	$ 5,237,000
Maximum exposure to loss	4,600,000	$ 4,500,000
Aqua
Variable Interest Entity [Line Items]
Receivables from related parties	980,000
Subordinated Loan | Aqua
Variable Interest Entity [Line Items]
Receivables from related parties	980,000
Maximum exposure to loss	$ 980,000

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For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

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