v3.26.1
Borrowings, FHLB Stock and Subordinated Notes - Narrative (Details) - USD ($)
1 Months Ended 6 Months Ended
Jul. 01, 2026
Oct. 01, 2025
Sep. 30, 2020
Jun. 30, 2026
Dec. 31, 2025
Short-term Debt [Line Items]          
Investment in FHLB stock       $ 670,000 $ 1,060,000
Subordinated notes, net       7,822,000 7,801,000
Subordinated Debt          
Short-term Debt [Line Items]          
Aggregate principal amount     $ 12,000,000.0 8,000,000.0  
Redeemed notes   $ 4,000,000.0      
Subordinated notes, net       7,800,000 7,800,000
Subordinated Debt | Subsequent Event          
Short-term Debt [Line Items]          
Redeemed notes $ 2,000,000.0        
Subordinated Debt | Period before October 1, 2025          
Short-term Debt [Line Items]          
Interest rate (as a percent)     5.25%    
Subordinated Debt | Period after October 1, 2025          
Short-term Debt [Line Items]          
Basis spread on variable rate     5.13%    
Federal Reserve Bank of San Francisco          
Short-term Debt [Line Items]          
Outstanding borrowings       0 0
Pacific Coast Banker's Bank | Line of Credit          
Short-term Debt [Line Items]          
Amount available to borrow under loan agreement       $ 20,000,000.0  
Term period (in years)       1 year 6 months  
Outstanding borrowings       $ 0 0
Asset Pledged as Collateral | Federal Reserve Bank of San Francisco          
Short-term Debt [Line Items]          
Amount available to borrow under loan agreement       $ 21,100,000 $ 18,500,000