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Investment Securities - Schedule of available-for-sale securities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Gain (Loss) on Securities [Line Items]      
Unrealized gain (loss) on investment securities held at the end of the period $ 15,664 $ (14,799) $ 1,602
Investment securities 150,522 85,415  
Long-Term Cash Awards      
Gain (Loss) on Securities [Line Items]      
Investment securities $ 107,000 $ 63,300