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RETIREMENT AND POSTRETIREMENT PLANS - 401(K) Plan - (Details) - 401 K Plan - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 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 | $ 5,700,000 | $ 4,700,000 | $ 5,700,000 | $ 4,700,000
Total expense recognized as a component of salaries and employee benefits expense | $ 1,900,000 | $ 796,000 | $ 1,900,000 | $ 1,700,000

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