MORTGAGE BANKING ACTIVITIES (Summary of mortgage servicing rights) (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024 USD ($) Contracts	Dec. 31, 2023 USD ($) Contracts
Servicing Assets at Fair Value [Line Items]
Outstanding principal balance of residential mortgage loans serviced for others	$ 2,731,172	$ 2,733,918
Residential Mortgage [Member]
Servicing Assets at Fair Value [Line Items]
Number of residential mortgage loans serviced for others | Contracts	463	450
Outstanding principal balance of residential mortgage loans serviced for others	$ 120,713	$ 108,897
Weighted average interest rate	5.48%	5.37%
Remaining contractual term (in months)	349 months	309 months