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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025
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Statement of Financial Position [Abstract] |  |
Securities available for sale, amortized cost | $ 6,287,446 | $ 6,341,322
Securities held to maturity, fair value | 1,926,729 | 2,011,026
Loans held-for-sale, fair value | 36,477 | 33,158
Property and equipment, accumulated depreciation | 371,743 | 370,818
Right of use assets, accumulated amortization | $ 77,077 | $ 73,527
Preferred stock, par value per share | $ 20 | $ 20
Common stock, par value per share | $ 3.33 | $ 3.33

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