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LEASES - Summary of supplemental balance sheet information (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Sep. 30, 2020
--- | --- | ---
Operating Leases: |  |
Operating right-of-use assets | $ 144,598 | $ 154,349
Lease Liabilities: |  |
Current portion of operating lease liabilities | 29,881 | 29,672
Long-term operating lease liabilities | 119,315 | 130,588
Total operating lease liabilities | 149,196 | 160,260
Finance Leases: |  |
Property, plant and equipment, net | $ 16,466 | $ 18,774
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 | $ 2,347 | $ 3,352
Long-term debt, net | 14,120 | 15,339
Total financing lease liabilities | $ 16,467 | $ 18,691
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 | Long-term debt
Accumulated depreciation | $ 6,136 | $ 2,383

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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