INCOME TAXES (Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal income tax statutory rate	21.00%	21.00%	21.00%
Increase (decrease) in tax rate due to:
Tax-exempt interest	(3.60%)	(3.60%)	(3.00%)
Investment in life insurance	(0.90%)	(0.70%)	(0.40%)
State income taxes, net of federal tax offset	2.60%	2.30%	2.20%
Tax credits	(2.70%)	(1.90%)	(1.50%)
Low income housing partnerships, net of amortization	2.00%	1.30%	1.10%
Other	0.70%	0.50%	(0.90%)
Effective income tax rate	19.10%	18.90%	18.50%