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RETIREMENT BENEFITS (Amortization of AOCI and Estimated Future Benefit Payments) (Details) - SERPs
$ in Thousands
Dec. 31, 2025
USD ($)
Estimated future benefit payments  
2026 $ 574
2027 567
2028 958
2029 1,030
2030 1,024
Thereafter 4,740
Total $ 8,893