OTHER COMPREHENSIVE INCOME (LOSS) - Amounts Reclassified from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2023	Jun. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income before taxes from continuing operations	$ 78,453			$ 76,050			$ 56,314	$ 182,765
Tax benefit (expense)	(29,248)			(23,268)			(20,662)	(55,119)
Net income	49,205	$ (62,255)	$ 48,702	140,287	$ 65,689	$ 19,298	35,652	225,274
Accumulated other comprehensive income (loss), attributable to parent | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income before taxes from continuing operations	(303)			(128)			(1,179)	1,099
Tax benefit (expense)	64			27			248	(230)
Net income	(239)			(101)			(931)	869
Pension and other defined benefit plans | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income before taxes from continuing operations	(944)			(844)			(2,833)	(2,534)
Cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income before taxes from continuing operations	$ 641			$ 716			$ 1,654	$ 3,633