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RETIREMENT AND POSTRETIREMENT PLANS - 401(K) Plan - (Details) - 401 K Plan - USD ($) | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Defined Benefit Plan Disclosure [Line Items] |  |
Maximum contribution by employee, for the calendar year | $ 23,500 |
Maximum Percentage of participating employee contribution | 3.00% |
Common stock within the accounts of participants | $ 6,000,000 | $ 4,400,000
Total expense recognized as a component of salaries and employee benefits expense | $ 0 | $ 872,000

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