Accounts Receivable (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2023	Sep. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance contracts maximum funding period	30 days
Total accounts receivable	$ 81,921	$ 59,126
Less – allowance for credit losses	(881)	(1,166)
Total accounts receivable, net	81,040	57,960
Contracts in transit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	42,631	14,543
Trade accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	31,543	37,359
Manufacturer receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 7,747	$ 7,224