DEPOSITS - Summary of deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deposits [Abstract]
Weighted Average Rate, Savings accounts	2.24%	0.03%
Weighted Average Rate, Certificates of deposit	2.25%	0.58%
Weighted Average Rate, Money market accounts	1.50%	0.07%
Weighted Average Rate, Interest-bearing checking accounts	1.01%	0.18%
Weighted Average Rate, Total	1.19	0.09
Liability, Savings accounts	$ 2,260,101	$ 1,158,040
Liability, Certificates of deposit ("CDs")	1,115,364	853,242
Liability, Money market accounts	2,532,270	3,621,552
Liability, Interest-bearing checking accounts	827,454	905,717
Liability, Non-interest bearing checking accounts	3,519,218	3,920,423
Liability, Total	$ 10,254,407	$ 10,458,974