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Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Schedule Of Other Assets [Line Items]
Other assets	$ 380,236	$ 345,292
Federal Home Loan Bank ("FHLB") and Federal Reserve Bank ("Federal Reserve")
Schedule Of Other Assets [Line Items]
Fair value of equity securities	130,900	135,200
First National Bankers' Bank and Other Miscellaneous Holdings
Schedule Of Other Assets [Line Items]
Fair value of equity securities	$ 95,000	$ 91,200

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