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DEBT - Additional information (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022
DEBT
Available to borrow under the credit facility	$ 332,000
Cash on hand	48,221	$ 97,724
Current maturities of long-term debt	20,000
Letters of credit outstanding, amount	7,300
Revolving Credit Facility
DEBT
Line of credit facility, amount outstanding	500,000
Line of credit facility, commitment fee amount	$ 250,000
Minimum
DEBT
Debt, weighted average interest rate	5.33%		1.23%
Maximum
DEBT
Incremental term loan	$ 250,000
Debt, weighted average interest rate	5.97%		1.29%