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Debt - Schedule of Long-term Debt Obligations (Parenthetical) (Details) - USD ($)
$ in Thousands
 6 Months Ended
Mar. 31, 2026
Sep. 30, 2025
Debt Instrument [Line Items]    
Unamortized Debt Issuance Expense [1] $ 2,028 $ 2,566
Long term debt $ 25,000 25,000
Line of Credit    
Debt Instrument [Line Items]    
Credit facility maturity date Jan. 03, 2028  
Secured Debt    
Debt Instrument [Line Items]    
Long term debt maturity repayments of principal remainder of fiscal year $ 12,500  
Long term debt maturity repayments year one 25,000  
Long term debt maturity repayments year two 418,700  
Other Current Assets | Line of Credit    
Debt Instrument [Line Items]    
Unamortized Debt Issuance Expense 2,700 2,700
Other Noncurrent Assets | Line of Credit    
Debt Instrument [Line Items]    
Unamortized Debt Issuance Expense $ 2,900 $ 3,300
[1] As of March 31, 2026 and September 30, 2025, all unamortized debt issuance costs for the senior notes were included in Long-term debt on the Consolidated Balance Sheets.