LONG-TERM DEBT - Schedule of Interest Expense Incurred (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Cash Interest, Capitalized Interest	$ (196)	$ (2)
Cash Interest	24,243	23,625
Amort. Debt (Premium)/Discount	31	31
Amort. Debt Issuance Costs & Other Fees	1,025	992
Total Interest Expense	$ 25,299	$ 24,648
Senior notes due 2028
Debt Instrument [Line Items]
Effective Interest Rate	5.90%	5.90%
Cash Interest, Including Amounts Capitalized	$ 14,012	$ 14,012
Amort. Debt (Premium)/Discount	(12)	(12)
Amort. Debt Issuance Costs & Other Fees	505	505
Total Interest Expense	$ 14,505	$ 14,505
Term Loan B due 2029
Debt Instrument [Line Items]
Effective Interest Rate	7.80%	6.60%
Cash Interest, Including Amounts Capitalized	$ 9,217	$ 7,808
Amort. Debt (Premium)/Discount	43	43
Amort. Debt Issuance Costs & Other Fees	330	351
Total Interest Expense	9,590	8,202
Revolver due 2025
Debt Instrument [Line Items]
Cash Interest, Including Amounts Capitalized	908	1,344
Amort. Debt (Premium)/Discount	0	0
Amort. Debt Issuance Costs & Other Fees	186	123
Total Interest Expense	1,094	$ 1,467
Finance lease - real estate
Debt Instrument [Line Items]
Effective Interest Rate		5.60%
Cash Interest, Including Amounts Capitalized	0	$ 178
Amort. Debt (Premium)/Discount	0	0
Amort. Debt Issuance Costs & Other Fees	0	0
Total Interest Expense	0	178
Non US lines of credit
Debt Instrument [Line Items]
Cash Interest, Including Amounts Capitalized	0	155
Amort. Debt (Premium)/Discount	0	0
Amort. Debt Issuance Costs & Other Fees	4	13
Total Interest Expense	4	168
Other long term debt
Debt Instrument [Line Items]
Cash Interest, Including Amounts Capitalized	302	130
Amort. Debt (Premium)/Discount	0	0
Amort. Debt Issuance Costs & Other Fees	0	0
Total Interest Expense	$ 302	$ 130