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EMPLOYEE BENEFIT PLANS - Schedule of Estimated future benefit payments to retirees (Details)
$ in Thousands
Sep. 30, 2025
USD ($)
Defined Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2026 $ 10,929
2027 10,869
2028 10,772
2029 10,655
2030 10,470
2031-2035 48,453
Supplemental Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2026 1,813
2027 1,637
2028 1,461
2029 1,287
2030 1,118
2031-2035 $ 3,453