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RETIREMENT BENEFITS (Amortization of AOCI and Estimated Future Benefit Payments) (Details) - SERPs $ in Thousands | Dec. 31, 2023 USD ($)
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Estimated future benefit payments |
2024 | $ 574
2025 | 570
2026 | 564
2027 | 559
2028 | 950
Thereafter | 6,057
Total | $ 9,274

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