Supporting Financial Information - Debt Obligations (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Sep. 30, 2024
Debt Instrument [Line Items]
Long-term debt	$ 142,289
Net bank debt obligations	138,348	$ 149,374
Less: current portion of debt obligations, net of deferred financing costs (a)	(14,039)	(12,058)
Long-term portion of debt obligations, net of deferred financing costs	124,309	137,316
Secured Debt
Debt Instrument [Line Items]
Long-term debt	128,250	142,500
Less: unamortized deferred financing costs	(3,941)	(5,184)
Revolving Line of Credit
Debt Instrument [Line Items]
Long-term debt	14,039	12,058
Revolving Line of Credit | Secured Debt
Debt Instrument [Line Items]
Long-term debt	$ 14,039	$ 12,058