DEBT - Schedule of Effective Interest Rates (Details)	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Term Loan
DEBT
Effective interest rates (percent)	11.06%	10.40%	11.30%	10.32%
Delayed Draw Term Loan
DEBT
Effective interest rates (percent)	11.05%	10.45%	11.29%	10.35%
Additional Term Loans
DEBT
Effective interest rates (percent)	11.17%	10.68%	11.42%	11.07%