FAIR VALUE MEASUREMENTS (Details) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2021 USD ($) $ / shares
Designated as Hedging Instrument | Australian Dollar Forward Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, notional amount	$ 36,000	$ 36,000
Contracts weighted average rate price (in dollars per share) | $ / shares		$ 1.28
Deferred gain (loss) from currency translation included in AOCI	(1,317)	$ (1,317)
Deferred gain (loss) from currency translation included in AOCI, net of tax	(922)	(922)
Designated as Hedging Instrument | Australian Dollar Forward Contracts | Cost of goods and services
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) reclassified for settled contracts	(413)	$ (2,812)
Designated as Hedging Instrument | Australian Dollar Forward Contracts | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts duration		1 day
Designated as Hedging Instrument | Australian Dollar Forward Contracts | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts duration		119 days
Not Designated as Hedging Instrument | Canadian Dollar Forward Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, notional amount	$ 8,425	$ 8,425
Derivative, average forward exchange rate	1.27	1.27
Not Designated as Hedging Instrument | Canadian Dollar Forward Contracts | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts duration		30 days
Not Designated as Hedging Instrument | Canadian Dollar Forward Contracts | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts duration		420 days
Not Designated as Hedging Instrument | British Pound Forward Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, notional amount	$ 950	$ 950
Derivative, average forward exchange rate	0.75	0.75
Not Designated as Hedging Instrument | British Pound Forward Contracts | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts duration		6 days
Not Designated as Hedging Instrument | British Pound Forward Contracts | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts duration		21 days
Fair Value, Inputs, Level 1 | Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities,	$ 1,316	$ 1,316
Fair Value, Inputs, Level 1 | Portion at Other than Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities,	1,339	1,339
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Insurance contracts fair value	3,924	3,924
Fair Value, Inputs, Level 2 | Not Designated as Hedging Instrument | Canadian Dollar Forward Contracts | Other income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) on foreign currency derivative instruments not designated as hedging instruments	(106)	138
Realized gains (losses)	(124)	(285)
Fair Value, Inputs, Level 2 | Not Designated as Hedging Instrument | British Pound Forward Contracts | Other income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) on foreign currency derivative instruments not designated as hedging instruments	(111)	30
Realized gains (losses)	(224)	(505)
Fair Value, Inputs, Level 2 | Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2,196	2,196
Fair Value, Inputs, Level 2 | Portion at Other than Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1,000	1,000
Senior notes due 2028 | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior note, fair value disclosure	$ 1,061,250	$ 1,061,250