v3.25.3
Fair Value - Schedule of Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale $ 232,640 $ 223,630  
Loans held for sale 19,679 21,270  
Loan servicing assets 2,070 5,511 $ 0
Contractual principal      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Loans held for sale 13,779 16,721  
Loan servicing assets 2,070 5,511  
U.S. Treasuries      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 136,541 126,835  
Municipal      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 13,779 9,283  
Corporate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 4,792 4,711  
Asset-backed securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 5,208 5,526  
Mortgage-backed securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 72,320 77,275  
Quoted Prices in Active Markets for Identical Assets (Level 1) | Contractual principal      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Loan servicing assets 0 0  
Significant Other Observable Inputs (Level 2) | Contractual principal      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Loan servicing assets 2,070 5,511  
Significant Unobservable Inputs (Level 3) | Contractual principal      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Loan servicing assets 0 0  
Fair Value, Measurements, Recurring      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 232,640 223,630  
Loans held for sale 19,679 21,270  
Fair Value, Measurements, Recurring | U.S. Treasuries      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 136,541 126,835  
Fair Value, Measurements, Recurring | Municipal      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 13,779 9,283  
Fair Value, Measurements, Recurring | Corporate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 4,792 4,711  
Fair Value, Measurements, Recurring | Asset-backed securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 5,208 5,526  
Fair Value, Measurements, Recurring | Mortgage-backed securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 72,320 77,275  
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 136,541 126,835  
Loans held for sale 0 0  
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasuries      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 136,541 126,835  
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 0 0  
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 0 0  
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 0 0  
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 0 0  
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 96,099 96,795  
Loans held for sale 19,679 21,270  
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. Treasuries      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 0 0  
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Municipal      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 13,779 9,283  
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Corporate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 4,792 4,711  
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Asset-backed securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 5,208 5,526  
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 72,320 77,275  
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 0 0  
Loans held for sale 0 0  
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | U.S. Treasuries      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 0 0  
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Municipal      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 0 0  
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Corporate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 0 0  
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Asset-backed securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale 0 0  
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available-for-sale $ 0 $ 0