VARIABLE INTEREST ENTITIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
VARIABLE INTEREST ENTITIES
Cash and cash equivalents	$ 190,962	$ 209,896
Premises and equipment, net	173,418	160,778
Other assets	435,611	446,304
Total assets	15,555,753	15,835,651	$ 15,552,657
Accrued interest and other liabilities	$ 164,497	133,863
Variable Interest Entities | 706 North Clinton
VARIABLE INTEREST ENTITIES
Percentage of membership interest	50.00%
Cash and cash equivalents	$ 182	226
Premises and equipment, net	5,291	5,455
Other assets	74	65
Total assets	5,547	5,746
Accrued interest and other liabilities	0	$ 0
Minority interest	2,800
Loss of minority interest	3,900
Minority interest loss exposure related to financing agreement	$ 1,100