LEASES - SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Operating cash flows for operating leases	$ 6,675	$ 8,804
Operating cash flows for finance leases	1,167	1,189
Financing cash flows for finance leases	$ 8,180	$ 6,985