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Fair Value of Financial Instruments (Financial instruments Measured at Fair Value) (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | $ 2,064,516 | $ 2,043,062
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other assets | Other assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other liabilities | Other liabilities
U.S. Treasuries |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | $ 123,011 | $ 120,581
Government-sponsored enterprise securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 9,938 | 9,614
Mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 1,905,461 | 1,897,175
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 | U.S. Treasuries |  |
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 | 2,062,070 | 2,040,606
Derivative financial assets | 915 | 301
Presold mortgages in process of settlement | 5,166 | 5,942
Derivative financial liabilities | 917 | 302
Significant Other Observable Inputs (Level 2) | Recurring | U.S. Treasuries |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 123,011 | 120,581
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 | 9,938 | 9,614
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 | 1,904,765 | 1,896,469
Significant Other Observable Inputs (Level 2) | Recurring | Corporate bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 24,356 | 13,942
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 | 2,446 | 2,456
Derivative financial assets | 0 | 0
Presold mortgages in process of settlement | 0 | 0
Derivative financial liabilities | 0 | 0
Significant Unobservable Inputs (Level 3) | Recurring | U.S. Treasuries |  |
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 | 696 | 706
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 | 1,750
Significant Unobservable Inputs (Level 3) | Nonrecurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Individually evaluated loans | 2,907 | 879
Estimated Fair Value | Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 2,064,516 | 2,043,062
Derivative financial assets | 915 | 301
Presold mortgages in process of settlement | 5,166 | 5,942
Derivative financial liabilities | 917 | 302
Estimated Fair Value | Recurring | U.S. Treasuries |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 123,011 | 120,581
Estimated Fair Value | Recurring | Government-sponsored enterprise securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 9,938 | 9,614
Estimated Fair Value | Recurring | Mortgage-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 1,905,461 | 1,897,175
Estimated Fair Value | Recurring | Corporate bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 26,106 | 15,692
Estimated Fair Value | Nonrecurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Individually evaluated loans | $ 2,907 | $ 879

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