DEPOSITS - Schedule of Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Statistical Disclosure for Banks [Abstract]
Demand deposits	$ 7,965,862	$ 8,448,797
Savings deposits	4,516,433	4,657,140
Certificates and other time deposits of $100,000 or more	1,408,985	742,539
Other certificates and time deposits	849,906	468,712
Brokered certificates of deposits	80,267	65,557
Total deposits	$ 14,821,453	$ 14,382,745