STOCK-BASED COMPENSATION - Stock-based compensation expense (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2022	Sep. 30, 2021
STOCK-BASED COMPENSATION
Stock-based compensation, before income taxes	$ 28,974	$ 1,786
Provision for income taxes	(5,123)	(1,161)
Stock-based compensation, net of income taxes	23,851	625
General and administrative
STOCK-BASED COMPENSATION
Stock-based compensation, before income taxes	5,960	$ 1,786
Other operating expense
STOCK-BASED COMPENSATION
Stock-based compensation, before income taxes	$ 23,014

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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