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RETIREMENT PLANS AND OTHER POST-RETIREMENT BENEFITS - Schedule of Net Periodic Costs of Pension and Post-retirement Medical Benefit Plans (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Stock-based compensation benefit |  |  | $ 5,800 |
Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | $ 0 | $ 0 | 0 | $ 0
Interest cost | 347 | 244 | 1,120 | 658
Amortization of prior service cost | 4 | 11 | 16 | 33
Amortization of actuarial (loss) gain | 21 | 161 | 64 | 492
Pension settlement charge | 0 | 0 | 633 | 0
Total net periodic benefit expense | 372 | 416 | 1,833 | 1,183
Other Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | 3 | 0 | 8 | 0
Interest cost | 44 | 33 | 133 | 98
Amortization of prior service cost | 6 | 26 | 16 | 78
Amortization of actuarial (loss) gain | (14) | 0 | (39) | 0
Total net periodic benefit expense | $ 39 | $ 59 | $ 118 | $ 176

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