Accounts Receivable (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2025	Sep. 30, 2024
Receivables [Abstract]
Finance contracts maximum funding period	30 days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 79,887	$ 73,820
Less – allowance for credit losses	(415)	(551)
Total accounts receivable, net	79,472	73,269
Contracts in transit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	31,962	20,437
Trade accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	29,946	32,578
Manufacturer receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	13,994	11,435
Income tax receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 3,985	$ 9,370