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Fair Value Measurements - Summary of Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Assets |  |
Securities available for sale | $ 1,786,793 | $ 1,618,273
Estimate of Fair Value Measurement |  |
Assets |  |
Other investments | 72,705 | 63,255
Obligations of U.S. Government-sponsored enterprises |  |
Assets |  |
Securities available for sale | 299,674 | 296,446
Obligations of states and political subdivisions |  |
Assets |  |
Securities available for sale | 424,177 | 432,171
Agency mortgage-backed securities |  |
Assets |  |
Securities available for sale | 882,669 | 700,381
U.S. Treasury bills |  |
Assets |  |
Securities available for sale | 159,695 | 181,701
Corporate debt securities |  |
Assets |  |
Securities available for sale | 20,578 | 7,574
Recurring basis | Estimate of Fair Value Measurement |  |
Assets |  |
Securities available for sale | 1,786,793 | 1,618,273
Other investments | 3,049 | 2,941
Derivatives | 16,577 | 17,789
Total assets | 1,806,419 | 1,639,003
Liabilities |  |
Derivatives | 11,640 | 16,184
Total liabilities | 11,640 | 16,184
Recurring basis | Obligations of U.S. Government-sponsored enterprises | Estimate of Fair Value Measurement |  |
Assets |  |
Securities available for sale | 299,674 | 296,446
Recurring basis | Obligations of states and political subdivisions | Estimate of Fair Value Measurement |  |
Assets |  |
Securities available for sale | 424,177 | 432,171
Recurring basis | Agency mortgage-backed securities | Estimate of Fair Value Measurement |  |
Assets |  |
Securities available for sale | 882,669 | 700,381
Recurring basis | U.S. Treasury bills | Estimate of Fair Value Measurement |  |
Assets |  |
Securities available for sale | 20,578 | 181,701
Recurring basis | Corporate debt securities | Estimate of Fair Value Measurement |  |
Assets |  |
Securities available for sale | 159,695 | 7,574
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets |  |
Securities available for sale | 0 | 0
Other investments | 0 | 0
Derivatives | 0 | 0
Total assets | 0 | 0
Liabilities |  |
Derivatives | 0 | 0
Total liabilities | 0 | 0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Obligations of U.S. Government-sponsored enterprises |  |
Assets |  |
Securities available for sale | 0 | 0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Obligations of states and political subdivisions |  |
Assets |  |
Securities available for sale | 0 | 0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Agency mortgage-backed securities |  |
Assets |  |
Securities available for sale | 0 | 0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasury bills |  |
Assets |  |
Securities available for sale | 0 | 0
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities |  |
Assets |  |
Securities available for sale | 0 | 0
Recurring basis | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Securities available for sale | 1,786,793 | 1,618,273
Other investments | 3,049 | 2,941
Derivatives | 16,577 | 17,789
Total assets | 1,806,419 | 1,639,003
Liabilities |  |
Derivatives | 11,640 | 16,184
Total liabilities | 11,640 | 16,184
Recurring basis | Significant Other Observable Inputs (Level 2) | Obligations of U.S. Government-sponsored enterprises |  |
Assets |  |
Securities available for sale | 299,674 | 296,446
Recurring basis | Significant Other Observable Inputs (Level 2) | Obligations of states and political subdivisions |  |
Assets |  |
Securities available for sale | 424,177 | 432,171
Recurring basis | Significant Other Observable Inputs (Level 2) | Agency mortgage-backed securities |  |
Assets |  |
Securities available for sale | 882,669 | 700,381
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. Treasury bills |  |
Assets |  |
Securities available for sale | 20,578 | 181,701
Recurring basis | Significant Other Observable Inputs (Level 2) | Corporate debt securities |  |
Assets |  |
Securities available for sale | 159,695 | 7,574
Recurring basis | Significant Unobservable Inputs (Level 3) |  |
Assets |  |
Securities available for sale | 0 | 0
Other investments | 0 | 0
Derivatives | 0 | 0
Total assets | 0 | 0
Liabilities |  |
Derivatives | 0 | 0
Total liabilities | 0 | 0
Recurring basis | Significant Unobservable Inputs (Level 3) | Obligations of U.S. Government-sponsored enterprises |  |
Assets |  |
Securities available for sale | 0 | 0
Recurring basis | Significant Unobservable Inputs (Level 3) | Obligations of states and political subdivisions |  |
Assets |  |
Securities available for sale | 0 | 0
Recurring basis | Significant Unobservable Inputs (Level 3) | Agency mortgage-backed securities |  |
Assets |  |
Securities available for sale | 0 | 0
Recurring basis | Significant Unobservable Inputs (Level 3) | U.S. Treasury bills |  |
Assets |  |
Securities available for sale | 0 | 0
Recurring basis | Significant Unobservable Inputs (Level 3) | Corporate debt securities |  |
Assets |  |
Securities available for sale | $ 0 | $ 0

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