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Investment Securities - Credit Valuation Allowance for Available For Sale Debt Securities (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]      
Balance at January 1 $ 3,952 $ 578 $ 0
Credit losses on securities for which credit losses were not previously recorded 996 3,860 578
Increase in credit losses on previously impaired securities 4,675 0 0
Decrease in allowance for credit losses on previously impaired securities (1,849) (95) 0
Reduction due to sales (170) (391) 0
Balance at December 31 7,604 3,952 578
Asset-backed securities      
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]      
Balance at January 1 483 578 0
Credit losses on securities for which credit losses were not previously recorded 224 0 578
Increase in credit losses on previously impaired securities 0 0 0
Decrease in allowance for credit losses on previously impaired securities (345) (95) 0
Reduction due to sales 0 0 0
Balance at December 31 362 483 578
Corporate notes      
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]      
Balance at January 1 3,469 0 0
Credit losses on securities for which credit losses were not previously recorded 665 3,860 0
Increase in credit losses on previously impaired securities 4,675 0 0
Decrease in allowance for credit losses on previously impaired securities (1,504) 0 0
Reduction due to sales (170) (391) 0
Balance at December 31 7,135 3,469 $ 0
Private label CMOs      
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]      
Balance at January 1 0    
Credit losses on securities for which credit losses were not previously recorded 107    
Increase in credit losses on previously impaired securities 0    
Decrease in allowance for credit losses on previously impaired securities 0    
Reduction due to sales 0    
Balance at December 31 $ 107 $ 0