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Investment Securities Available-for-Sale and Held to Maturity - Carrying Amount and Fair Values of Investment Securities Held To Maturity (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Debt Securities, Held-to-Maturity [Line Items]    
Carrying Value $ 206,037 $ 0
Estimated Fair Value 206,037  
Asset-backed securities    
Debt Securities, Held-to-Maturity [Line Items]    
Carrying Value 206,037  
Estimated Fair Value $ 206,037