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SECURITIES - Realized Gain (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]    
Gross Realized Gains $ 32,924 $ 4,269
Gross Realized Losses (471,172) (526,117)
Net Realized Gains (Losses) $ (438,248) $ (521,848)