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Junior and Other Subordinated Debentures (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Junior Subordinated Debentures [Line Items]      
Common stock issued by Trusts $ 14,300 $ 14,300  
Unrealized (losses) gains arising during the period (14,812) 7,866 $ (28,842)
Other Subordinated Debt      
Junior Subordinated Debentures [Line Items]      
Junior and other subordinated debentures, at amortized cost $ 10,000 $ 10,000  
Basis spread on SOFR+0.26161% 5.26% 5.26%  
Junior Subordinated Debt, at Amortized Cost      
Junior Subordinated Debentures [Line Items]      
Junior and other subordinated debentures, at amortized cost $ 97,668    
Junior Subordinated Debt, at Amortized Cost | Bank of Commerce Holdings Trust II      
Junior Subordinated Debentures [Line Items]      
Junior and other subordinated debentures, at amortized cost $ 10,310    
Basis spread on SOFR+0.26161% 1.58%