POST EMPLOYMENT BENEFITS - Net periodic benefit costs (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2022 USD ($)
Components of net periodic benefit expense:
Service cost	$ 0
Interest cost	$ 381
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest Expense
Expected return on assets	$ (744)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)
Net periodic benefit cost	$ (362)