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DEBT (Tables)
6 Months Ended
Mar. 31, 2021
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:
March 31, 2021September 30, 2020
(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, 2025$487,148 $(5,501)$481,647 $487,148 $(6,421)$480,727 
487,148 (5,501)481,647 487,148 (6,421)480,727 
Less long-term debt due within one year— — — — — — 
Long-term debt$487,148 $(5,501)$481,647 $487,148 $(6,421)$480,727