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Subsequent Event (Details) - USD ($)
$ in Thousands
Apr. 01, 2024
Mar. 31, 2024
Dec. 31, 2023
Subsequent Event [Line Items]      
Gross unrealized loss   $ 1,465,692 $ 1,334,132
Subsequent Event      
Subsequent Event [Line Items]      
Debt securities transferred from available for sale to held to maturity $ 3,420,000    
Gross unrealized loss $ 708,500