INCOME TAXES - Provision (benefit) for income taxes on income from continuing operations (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Current	$ 26,177	$ 24,140	$ 26,218
Deferred	13,763	2,122	(5,465)
Total	39,940	26,262	20,753
U.S. Federal	14,577	7,897	8,973
State and local	7,132	7,223	5,499
Non-U.S.	$ 18,231	$ 11,142	$ 6,281

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of current and deferred federal income tax expense (benefit) attributable to income (loss) from continuing operations.

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Amount of current and deferred foreign income tax expense (benefit) attributable to income (loss) from continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of state and local current and deferred income tax expense (benefit) attributable to continuing operations.

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