NONINTEREST INCOME - Investment Management and Fiduciary Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Total investment management and fiduciary income
Revenue from External Customer [Line Items]
Noninterest income	$ 131,050	$ 121,608	$ 62,348
Trust fees
Revenue from External Customer [Line Items]
Noninterest income	89,396	79,472	43,725
Wealth management and advisory fees
Revenue from External Customer [Line Items]
Noninterest income	$ 41,654	$ 42,136	$ 18,623