Quarterly report pursuant to Section 13 or 15(d)

Available-for-Sale Securities, at Fair Value Nonconsolidated Variable Interest Entities (Details)

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Available-for-Sale Securities, at Fair Value Nonconsolidated Variable Interest Entities (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Variable Interest Entity [Line Items]    
Available-for-sale securities, at fair value $ 8,182,544 $ 8,327,149
Variable Interest Entity, Not Primary Beneficiary    
Variable Interest Entity [Line Items]    
Available-for-sale securities, at fair value 4,000 4,200
Maximum exposure to loss of nonconsolidated Variable Interest Entities $ 4,000 $ 4,200