LEASES - Summary of supplemental balance sheet information (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Operating Leases:
Operating right-of-use assets	$ 169,942	$ 183,398
Lease Liabilities:
Current portion of operating lease liabilities	32,632	31,680
Long-term operating lease liabilities	147,224	159,414
Total operating lease liabilities	179,856	191,094
Finance Leases:
Property, plant and equipment, net	$ 994	$ 13,696
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	PROPERTY, PLANT AND EQUIPMENT, net	PROPERTY, PLANT AND EQUIPMENT, net
Lease Liabilities:
Notes payable and current portion of long-term debt	$ 280	$ 2,065
Long-term debt, net	184	11,995
Total financing lease liabilities	$ 464	$ 14,060
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Notes payable and current portion of long-term debt	Notes payable and current portion of long-term debt
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-Term Debt, Excluding Current Maturities	Long-Term Debt, Excluding Current Maturities
Accumulated depreciation	$ 6,769	$ 4,972