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Investment Securities - Investments, Debt and Equity Securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Marketable Securities [Line Items]    
Investments in equity securities $ 193,658 $ 139,240
Investments in equity securities accounted for under the equity method 13,028 11,282
Consolidated Entity, Excluding VIE    
Marketable Securities [Line Items]    
Total investment securities $ 206,686 $ 150,522