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Investment Securities Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
May 31, 2024
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Schedule of Investments [Line Items]            
Debt Securities, Held-to-Maturity, Fair Value   $ 1,064,304   $ 1,064,304   $ 1,072,207
Proceeds from sales of AFS securities $ 345,700     2,300,487 $ 80,666  
Debt securities, realized loss $ 20,300 89 $ 0 20,462 $ 264  
Collateral Pledged [Member]            
Schedule of Investments [Line Items]            
Securities pledged as collateral   $ 600,000   $ 600,000   $ 400,000