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Investment Securities - Realized Gains (Losses) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]      
Gross gains on sales and calls of securities $ 396 $ 1,487 $ 11
Gross losses on sales and calls of securities (14,500)    
Net gains (losses) on sales and calls of securities $ 396 $ 1,487 $ 11