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DEBT (Tables)
6 Months Ended
Mar. 31, 2024
Debt Disclosure [Abstract]  
Schedule of Components of Unsecured Long-Term Debt Outstanding
We have the following unsecured long-term debt outstanding with maturity shown in the following table:
March 31, 2024September 30, 2023
(in thousands)Face Amount    Unamortized Discount and Debt Issuance Cost    Book Value    Face Amount    Unamortized Discount and Debt Issuance Cost    Book Value
Unsecured senior notes:
Due September 29, 2031$550,000 $(4,559)$545,441 $550,000 $(4,856)$545,144 
Long-term debt$550,000 $(4,559)$545,441 $550,000 $(4,856)$545,144