Accounts Receivable (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2023	Sep. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance contracts maximum funding period	30 days
Total accounts receivable	$ 94,839	$ 59,126
Less – allowance for credit losses	(867)	(1,166)
Total accounts receivable, net	93,972	57,960
Contracts in transit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	51,337	14,543
Trade accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	33,129	37,359
Manufacturer receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 10,373	$ 7,224