LEASES - SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating cash flows for operating leases	$ 2,932	$ 2,856
Operating cash flows for finance leases	791	704
Financing cash flows for finance leases	$ 5,690	$ 4,038