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PENSION & POSTRETIREMENT PLANS (Tables)
6 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Schedule of Pension and Postretirement Plan Expenses
Total periodic pension and postretirement (income) expense is summarized below:
 Three Months Ended March 31,Six Months Ended March 31,
 2023 2024 2023 2024 
Service cost$12 9 $24 18 
Interest cost54 55 108 110 
Expected return on plan assets
(71)(74)(142)(148)
Net amortization(20)(14)(40)(28)
Total$(25)(24)$(50)(48)