Debt - Schedule of Long-term Debt Obligations (Parenthetical) (Details) - USD ($) $ in Thousands		9 Months Ended
		Jun. 30, 2023	Sep. 30, 2022	Feb. 13, 2020
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense	[1]	$ 6,759	$ 8,372
3.625% Senior Notes Due 2025
Debt Instrument [Line Items]
Interest rate				3.625%
Line of Credit
Debt Instrument [Line Items]
Credit facility maturity date		Jan. 03, 2028
Long term debt maturity repayments year one		$ 9,400
Long term debt maturity repayments year two		21,900
Long term debt maturity repayments year three		25,000
Long term debt maturity repayments year four		25,000
Long term debt maturity repayments year five		25,000
Long term debt maturity repayments after year five		25,000
Other Current Assets | Line of Credit
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense		2,300
Other Noncurrent Assets | Line of Credit
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense		$ 8,100	$ 2,700

[1] Unamortized debt issuance costs for the senior notes are included in Long-term debt on the Consolidated Balance Sheets.