NONINTEREST INCOME - Schedule of Investment Management and Fiduciary Income (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Investment management and fiduciary income
Revenue from External Customer [Line Items]
Noninterest income	$ 41,272	$ 36,648	$ 124,327	$ 107,182
Trust fees
Revenue from External Customer [Line Items]
Noninterest income	31,511	25,295	91,902	73,299
Wealth management and advisory fees
Revenue from External Customer [Line Items]
Noninterest income	$ 9,761	$ 11,353	$ 32,425	$ 33,883

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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+ Details