LOANS - Variable Rate Loans and Loans purchased (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Loans Receivable with Variable Rates of Interest [Abstract]
Loans Receivable with Variable Rates of Interest	$ 1,200,000	$ 1,300,000
Loans Receivable with Variable Rates of Interest, with Interest Rate Floors	985,100	965,800
Loans Receivable with Variable Rates of Interest, with Interest Rate Floors, at Floor	866,600	854,000
Purchased loans, outstanding of collection	137,900	134,500
Purchased loans, past due 30 days or more	0	0
Purchased loans, purchase premiums remaining	0	10
Purchased loans, allowance for loan losses	$ 2,500	$ 1,300