NONINTEREST INCOME - Investment Management and Fiduciary Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Investment management and fiduciary income
Revenue from External Customer [Line Items]
Noninterest fee income	$ 29,504	$ 15,370	$ 90,877	$ 44,983
Trust fees
Revenue from External Customer [Line Items]
Noninterest fee income	19,170	10,626	58,658	31,198
Wealth management and advisory fees
Revenue from External Customer [Line Items]
Noninterest fee income	$ 10,334	$ 4,744	$ 32,219	$ 13,785