v3.26.1
Investment Securities - Narrative (Details)
Jun. 30, 2026
USD ($)
state
security
bond
company
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
security
Jun. 30, 2025
USD ($)
security
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Sep. 30, 2014
USD ($)
Debt Securities, Available-for-sale [Line Items]              
AFS allowance $ 0            
HTM allowance for credit losses 143,000 $ 145,000 $ 146,000 $ 198,000 $ 197,000 $ 196,000  
Amortized Cost $ 352,134,000   $ 356,074,000 $ 368,071,000      
Number of securities temporarily impaired (security) | security 247   225 235      
Financing receivable, threshold period past due 30 days            
Debt securities, held-to-maturity, nonaccrual $ 0            
Amortized cost of securities transferred             $ 89,780,000
Fair value of securities transferred             89,757,000
Net unrealized loss, net of taxes on transferred securities             $ 15,000
Unamortized balance of net unrealized losses transferred $ 32,000   $ 38,000 $ 60,000      
Number of states | state 6            
Federal Home Loan Bank Stock $ 7,700,000   7,238,000 6,697,000      
Federal Reserve Bank Stock 1,037,000   1,037,000 1,037,000      
Impairment losses 0            
Other equity securities              
Debt Securities, Available-for-sale [Line Items]              
Securities pledged as collateral 340,073,000   385,197,000 347,745,000      
Agency and mortgage-backed securities              
Debt Securities, Available-for-sale [Line Items]              
HTM allowance for credit losses $ 0            
Municipal Bonds              
Debt Securities, Available-for-sale [Line Items]              
Number of private activity bonds | bond 2            
Amortized Cost $ 18,065,000            
Corporate securities              
Debt Securities, Available-for-sale [Line Items]              
HTM allowance for credit losses 77,000 $ 78,000 78,000 119,000 $ 116,000 $ 116,000  
Amortized Cost $ 21,000,000   21,000,000 28,000,000      
Number of individual companies | company 11            
U.S. Treasury & Agency securities              
Debt Securities, Available-for-sale [Line Items]              
HTM allowance for credit losses $ 0            
Amortized Cost $ 38,100,000   $ 38,100,000 $ 38,100,000