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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Securities available for sale, amortized cost	$ 6,203,454	$ 5,774,133
Securities held to maturity, fair value	2,064,591	2,233,526
Loans held-for-sale, fair value	33,161	18,929
Property and equipment, accumulated depreciation	365,542	345,962
Right of use assets, accumulated amortization	$ 71,153	$ 67,063
Preferred stock, par value per share	$ 20	$ 20
Common stock, par value per share	$ 3.33	$ 3.33

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