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DEBT (Tables)
12 Months Ended
Sep. 30, 2022
Debt Disclosure [Abstract]  
Schedule of Components of Unsecured Long-Term Debt Outstanding
We had the following unsecured long-term debt outstanding with maturities shown in the following table:
September 30, 2022September 30, 2021
(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 March 19, 20251
$— $— $— $487,148 $(3,662)$483,486 
Due September 29, 2031550,000 (7,390)542,610 550,000 (8,003)541,997 
550,000 (7,390)542,610 1,037,148 (11,665)1,025,483 
Less: long-term debt due within one year$— — — (487,148)3,662 (483,486)
Long-term debt$550,000 $(7,390)$542,610 $550,000 $(8,003)$541,997 
(1)Debt was extinguished prior to maturity date. Refer to 'Senior Notes' section below.
Schedule of Aggregate Maturities of Long-Term Debt
At September 30, 2022, aggregate maturities of long-term debt are as follows (in thousands):
Year ending September 30,    
2023$— 
2024— 
2025— 
2026— 
2027— 
Thereafter - Due 2031550,000 
$550,000