RETIREMENT AND POSTRETIREMENT PLANS - BNB Bank Pension Plans Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Employee Retirement Plan
Defined Benefit Plan Disclosure
Total Plan Assets	$ 19,206	$ 21,303	$ 22,593
Percentage of cumulative long term return on index	9.00%
Percentage of cumulative long term return on bonds	5.00%
Employee Retirement Plan's target allocation, expected annual rate of return	7.00%	7.00%
Employee Retirement Plan | Cash equivalents
Defined Benefit Plan Disclosure
Total Plan Assets	$ 136	$ 58
Employee Retirement Plan | Government
Defined Benefit Plan Disclosure
Total Plan Assets	19,070	21,245
Employee Retirement Plan | Level 1
Defined Benefit Plan Disclosure
Total Plan Assets	19,070	21,245
Employee Retirement Plan | Level 1 | Government
Defined Benefit Plan Disclosure
Total Plan Assets	19,070	21,245
Employee Retirement Plan | Level 2
Defined Benefit Plan Disclosure
Total Plan Assets	136	58
Employee Retirement Plan | Level 2 | Cash equivalents
Defined Benefit Plan Disclosure
Total Plan Assets	136	58
Pension Plan
Defined Benefit Plan Disclosure
Total Plan Assets	$ 30,107	$ 38,170	$ 38,572
Percentage of cumulative long term return on index	9.00%
Percentage of cumulative long term return on bonds	5.00%
Employee Retirement Plan's target allocation, expected annual rate of return	7.25%	7.25%
Pension Plan | Cash equivalents
Defined Benefit Plan Disclosure
Total Plan Assets	$ 1,062	$ 317
Pension Plan | Government
Defined Benefit Plan Disclosure
Total Plan Assets	29,045	37,853
Pension Plan | Level 1
Defined Benefit Plan Disclosure
Total Plan Assets	29,045	37,853
Pension Plan | Level 1 | Government
Defined Benefit Plan Disclosure
Total Plan Assets	29,045	37,853
Pension Plan | Level 2
Defined Benefit Plan Disclosure
Total Plan Assets	1,062	317
Pension Plan | Level 2 | Cash equivalents
Defined Benefit Plan Disclosure
Total Plan Assets	$ 1,062	$ 317