DEBT - Additional information (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2023	Sep. 30, 2022	Jun. 30, 2022
DEBT
Available to borrow under the credit facility	$ 345,000
Cash on hand	56,052	$ 97,724
Current maturities of long-term debt	20,000
Letters of credit outstanding, amount	7,400
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	5.57%		1.57%
Maximum
DEBT
Incremental term loan	$ 250,000
Debt, weighted average interest rate	6.05%		2.20%