INCOME TAXES - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Federal:
Current	$ 45,850	$ 54,817	$ 58,667
Deferred	11,115	(4,767)	3,334
Federal	56,965	50,050	62,001
State:
Current	6,578	7,837	4,425
Deferred	31	(1,872)	1,224
State	6,609	5,965	5,649
Total
Current	52,428	62,654	63,092
Deferred	11,146	(6,639)	4,558
Income tax expense	$ 63,574	$ 56,015	$ 67,650

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