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PENSION AND OTHER POSTRETIREMENT BENEFITS - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Pension Benefits          
Multiemployer pension plan liability adjustment $ 0 $ (4,500) $ 0 $ (4,453) $ 0
Pension Plan          
Pension Benefits          
Pension contributions       9,400 $ 9,700
Expected future employer contributions $ 13,000     $ 13,000