v3.26.1
Borrowings and Subordinated Debt - Narrative (Details)
6 Months Ended
Sep. 29, 2022
class
Jun. 30, 2026
USD ($)
Rate
May 01, 2026
USD ($)
Dec. 31, 2025
USD ($)
Debt Instrument [Line Items]        
Borrowings   $ 110,363,000   $ 113,634,000
FHLB secured advances | Federal Home Loan Bank of San Francisco        
Debt Instrument [Line Items]        
Balance outstanding   0   0
Subordinated debt        
Debt Instrument [Line Items]        
Redeemed outstanding aggregate principal     $ 385,000,000  
Debt interest rate     3.25%  
FHLB secured advances | FHLB secured advances        
Debt Instrument [Line Items]        
Financing capacity   7,100,000,000    
Debt collateral   (10,300,000,000)    
Balance outstanding   2,350,000,000   1,710,185,000
FHLB secured advances | FHLB secured advances | Federal Home Loan Bank of San Francisco        
Debt Instrument [Line Items]        
Financing capacity   3,800,000,000    
FHLB secured advances | Loans Receivable | FHLB secured advances        
Debt Instrument [Line Items]        
Debt collateral   (611,200,000)   (514,100,000)
FHLB secured advances | Loans Receivable | FHLB secured advances | Federal Home Loan Bank of San Francisco        
Debt Instrument [Line Items]        
Debt collateral   (4,700,000,000)    
FHLB secured advances | Securities | FHLB secured advances | Federal Home Loan Bank of San Francisco        
Debt Instrument [Line Items]        
Debt collateral   (100,000,000)    
Unsecured Debt | 522110 Commercial Banking        
Debt Instrument [Line Items]        
Balance outstanding   $ 0   0
Variable rate | Rate   2.25%    
Current borrowing capacity   $ 100,000,000.0    
Credit-linked notes        
Debt Instrument [Line Items]        
Number of note classes | class 5      
Weighted average interest rate   10.76%    
Secured debt   $ 2,100,000,000    
Borrowings   110,400,000    
Credit-linked notes | Minimum        
Debt Instrument [Line Items]        
Variable rate 8.00%      
Credit-linked notes | Maximum        
Debt Instrument [Line Items]        
Variable rate 13.25%      
Other short-term borrowings        
Debt Instrument [Line Items]        
Financing capacity   190,000,000.0    
Balance outstanding   0   $ 240,000,000.0
Unused commitment fee   $ 0