RETIREMENT AND POSTRETIREMENT PLANS - 401(K) Plan - (Details) - 401 K Plan - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Maximum contribution by employee, for the calendar year			$ 23,000
Percentage of match for first 1% of employee contributions			100.00%
Percentage of employee contribution on which 100% match by employer			1.00%
Percentage of match on next 1% of employee contributions			50.00%
Common stock within the accounts of participants	$ 6,300,000		$ 6,300,000
Total expense recognized as a component of salaries and employee benefits expense	$ 566,000	$ 513,000	$ 2,200,000	$ 2,000,000.0
Maximum
Defined Benefit Plan Disclosure [Line Items]
Percentage of employee contribution on which 50% match by employer			6.00%
Maximum Percentage of participating employee contribution			3.50%