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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Statement of Financial Position [Abstract] |  |
Securities available for sale, amortized cost | $ 6,238,835 | $ 6,310,214
Securities held to maturity, fair value | 2,623,760 | 2,615,398
Loans held-for-sale, fair value | 14,923 | 10,843
Property and equipment, accumulated depreciation | 304,305 | 303,451
Right of use assets, accumulated amortization | $ 46,939 | $ 44,901
Preferred stock, par value per share | $ 20.00 | $ 20.00
Common stock, par value per share | $ 3.33 | $ 3.33

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