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Fair Value of Financial Instruments - Financial instruments Measured at Fair Value (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | $ 2,043,062 | $ 2,189,379
Derivative financial liabilities | $ 302 | $ 349
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other assets | Other assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other liabilities |
US Treasury securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | $ 120,581 | $ 172,570
Government-sponsored enterprise securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 9,614 | 60,266
Mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 1,897,175 | 1,937,784
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Derivative financial assets | 0 | 0
Presold mortgages in process of settlement | 0 | 0
Derivative financial liabilities | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring | US Treasury securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring | Government-sponsored enterprise securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring | Mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring | Corporate bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Nonrecurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Individually evaluated loans | 0 | 0
Significant Other Observable Inputs (Level 2) | Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 2,040,606 | 2,189,379
Derivative financial assets | 301 | 295
Presold mortgages in process of settlement | 5,942 | 2,667
Derivative financial liabilities | 302 | 349
Significant Other Observable Inputs (Level 2) | Recurring | US Treasury securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 120,581 | 172,570
Significant Other Observable Inputs (Level 2) | Recurring | Government-sponsored enterprise securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 9,614 | 60,266
Significant Other Observable Inputs (Level 2) | Recurring | Mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 1,896,469 | 1,937,784
Significant Other Observable Inputs (Level 2) | Recurring | Corporate bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 13,942 | 18,759
Significant Other Observable Inputs (Level 2) | Nonrecurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Individually evaluated loans | 0 | 0
Significant Unobservable Inputs (Level 3) | Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 2,456 | 0
Derivative financial assets | 0 | 0
Presold mortgages in process of settlement | 0 | 0
Derivative financial liabilities | 0 | 0
Significant Unobservable Inputs (Level 3) | Recurring | US Treasury securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Significant Unobservable Inputs (Level 3) | Recurring | Government-sponsored enterprise securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Significant Unobservable Inputs (Level 3) | Recurring | Mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 706 | 0
Significant Unobservable Inputs (Level 3) | Recurring | Corporate bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 1,750 | 0
Significant Unobservable Inputs (Level 3) | Nonrecurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Individually evaluated loans | 879 | 1,953
Fair Value | Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 2,043,062 | 2,189,379
Derivative financial assets | 301 | 295
Presold mortgages in process of settlement | 5,942 | 2,667
Derivative financial liabilities | 302 | 349
Fair Value | Recurring | US Treasury securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 120,581 | 172,570
Fair Value | Recurring | Government-sponsored enterprise securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 9,614 | 60,266
Fair Value | Recurring | Mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 1,897,175 | 1,937,784
Fair Value | Recurring | Corporate bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 15,692 | 18,759
Fair Value | Nonrecurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Individually evaluated loans | $ 879 | $ 1,953

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