LEASES - Supplemental cash flow information (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 8,397	$ 2,205
Operating cash flows from finance leases	34	5
Financing cash flows from finance leases	2	1
Non-cash lease activity:
ROU assets obtained in exchange for new operating lease liabilities	$ 15,938	$ 7,658