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Borrowings and Subordinated Debentures - FHLB Secured Advances (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Debt Instrument [Line Items]    
Rate 5.12% 4.92%
Federal Home Loan Bank of San Francisco | Secured Debt [Member]    
Debt Instrument [Line Items]    
Line of credit, current $ 1,100,000 $ 0
Rate 3.93% 0.00%
Federal Home Loan Bank of San Francisco | Secured Debt [Member] | More Than Eighteen (18) Months but Less Than Twenty-Four Months (24)    
Debt Instrument [Line Items]    
Line of credit, current $ 150,000  
Rate 4.59%  
Federal Home Loan Bank of San Francisco | Secured Debt [Member] | More Than Twenty-Four (24) Months but Less Than Thirty-Six Months (36)    
Debt Instrument [Line Items]    
Line of credit, current $ 150,000  
Rate 4.39%  
Federal Home Loan Bank of San Francisco | Secured Debt [Member] | More Than Twenty-Four (24) Months but Less Than Thirty-Six Months (36) | Advance One    
Debt Instrument [Line Items]    
Line of credit, current $ 150,000  
Rate 4.63%  
Federal Home Loan Bank of San Francisco | Secured Debt [Member] | More Than Twenty-Four (24) Months but Less Than Thirty-Six Months (36) | Advance Two    
Debt Instrument [Line Items]    
Line of credit, current $ 150,000  
Rate 4.63%  
Federal Home Loan Bank of San Francisco | Secured Debt [Member] | More Than Nine Years but Less Than Ten Years    
Debt Instrument [Line Items]    
Line of credit, current $ 500,000  
Rate 3.18%