PENSION AND OTHER POSTRETIREMENT BENEFITS - Other Postretirement Benefits (Details) - Other Postretirement Benefit Plan - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Pension Benefits
Service cost	$ 3	$ 4	$ 6	$ 8
Interest cost	204	272	408	544
Amortization of actuarial loss	0	174	0	348
Net periodic pension cost/ (income) or postretirement benefit cost	$ 207	$ 450	$ 414	$ 900

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details