Credit Facilities - Summary of Loan Facilities and Subordinated Debt Financing (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Debt Instrument [Line Items]
Loan Balance	$ 154,558
Debt instrument, interest rate, effective percentage	5.20%	5.30%
Secured revolving line of credit
Debt Instrument [Line Items]
Loan Balance	$ 12,058	$ 9,546
Secured Debt
Debt Instrument [Line Items]
Loan Balance	142,500	169,813
Secured Debt | Term loan
Debt Instrument [Line Items]
Loan Balance	$ 142,500	$ 169,800
Debt instrument, basis spread on variable rate	4.10%	4.10%
Secured Debt | Secured revolving line of credit
Debt Instrument [Line Items]
Loan Balance	$ 12,100	$ 9,500
Debt instrument, basis spread on variable rate	4.10%	4.10%