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Investment Securities - Schedule of Securitization of Investments (Details) - Variable Interest Entity, Not Primary Beneficiary - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Variable Interest Entity [Line Items]    
Securitization investments $ 134,592 $ 106,748
Personal loans    
Variable Interest Entity [Line Items]    
Securitization investments 58,752 27,247
Student Loans    
Variable Interest Entity [Line Items]    
Securitization investments $ 75,840 $ 79,501