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DEBT (Tables)
12 Months Ended
Sep. 30, 2023
Debt Disclosure [Abstract]  
Schedule of Components of Unsecured Long-Term Debt Outstanding
We have the following unsecured long-term debt outstanding with maturities shown in the following table:
September 30, 2023September 30, 2022
(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 $(4,856)$545,144 $550,000 $(7,390)$542,610 
Long-term debt$550,000 $(4,856)$545,144 $550,000 $(7,390)$542,610 
Schedule of Aggregate Maturities of Long-Term Debt
At September 30, 2023, aggregate maturities of long-term debt are as follows (in thousands):
Year ending September 30,    
2024$— 
2025— 
2026— 
2027— 
2028— 
Thereafter - Due 2031550,000 
$550,000