LEASES - Reconciliation of future undiscounted cash flows to the operating and finance lease liabilities, and the related ROU assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Operating leases
2023 (excluding the six months ended March 31, 2023)	$ 3,579
2024	6,387
2025	5,085
2026	4,213
2027 and thereafter	36,773
Total minimum lease payments	56,037
Less: amounts representing interest	12,936
Present value of net minimum lease payments	$ 43,101
Location of operating lease liabilities included on Consolidated Balance Sheets	Accrued other expenses, Other liabilities
Less: current portion of lease obligations	$ 5,444
Non-current portion of lease obligations	37,657	$ 24,853
ROU assets	$ 41,418	$ 29,150
Location of operating lease ROU assets included on Consolidated Balance Sheets	ROU assets
Finance leases
2023 (excluding the six months ended March 31, 2023)	$ 1,130
2024	2,315
2025	2,370
2026	2,434
2027 and thereafter	18,996
Total minimum lease payments	27,245
Less: amounts representing interest	6,721
Present value of net minimum lease payments	$ 20,524
Location of finance lease liabilities included on Consolidated Balance Sheets	Accrued other expenses, Other liabilities
Less: current portion of lease obligations	$ 1,387
Non-current portion of lease obligations	19,137
ROU assets	$ 16,557
Location of finance lease ROU assets included on Consolidated Balance Sheets	Property, Plant and Equipment, Net