Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance contracts maximum funding period	30 days
Total accounts receivable	$ 113,878	$ 59,126
Less – allowance for credit losses	(703)	(1,166)
Total accounts receivable, net	113,175	57,960
Receivable for proceeds on the disposition of a business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	45,100	0
Trade accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	32,065	37,359
Contracts in transit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	25,425	14,543
Manufacturer receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total accounts receivable	$ 11,288	$ 7,224