INCOME TAXES - Effective income tax rate reconciliation (Details) - item	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
INCOME TAXES
Tax at statutory rate	21.00%	21.00%	21.00%	21.00%
Nontaxable interest and dividends	(0.50%)	(0.50%)	(0.50%)	(0.50%)
Tax credits	(4.00%)	(2.50%)	(4.40%)	(2.30%)
State taxes	1.30%	1.50%	2.00%	1.60%
Other	0.70%	0.20%	0.70%	0.70%
Effective income tax rate reconciliation, percent, Total	18.50%	19.70%	18.80%	20.50%
State and Local Jurisdiction
INCOME TAXES
Number Of Pending Audits	0		0