DEPOSITS - Summary of deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deposits [Abstract]
Weighted Average Rate, Savings accounts	3.67%	2.24%
Weighted Average Rate, CDs	4.43%	2.25%
Weighted Average Rate, Money market accounts	3.46%	1.50%
Weighted Average Rate, Interest-bearing checking accounts	0.77%	1.01%
Weighted Average Rate, Total	2.56	1.19
Liability, Savings accounts	$ 2,335,490	$ 2,260,101
Liability, CDs	1,607,683	1,115,364
Liability, Money market accounts	3,125,996	2,532,270
Liability, Interest-bearing checking accounts	515,987	827,454
Liability, Non-interest bearing checking accounts	2,945,499	3,519,218
Liability, Total	$ 10,530,655	$ 10,254,407