Inventories and Floor Plan Payables - Floor Plan Payable (Details) - Floor Plan Facility - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Floor Plan Payable
Maximum borrowing capacity	$ 1,700,000	$ 1,700,000
Increase in aggregate amount	$ 50,000
Applicable interest rate (as a percent)	4.30%	1.96%
FLAIR offset account amount	$ 218,600	$ 92,100
FLAIR Maximum Percentage	35.00%	35.00%
Maximum
Floor Plan Payable
Increase in aggregate amount	$ 200,000
BSBY Rate | Minimum
Floor Plan Payable
Variable rate spread (as a percent)	1.90%	1.90%
BSBY Rate | Maximum
Floor Plan Payable
Variable rate spread (as a percent)	2.50%	2.50%
Base Rate | Minimum
Floor Plan Payable
Variable rate spread (as a percent)	0.40%	0.40%
Base Rate | Maximum
Floor Plan Payable
Variable rate spread (as a percent)	1.00%	1.00%
Letters of credit
Floor Plan Payable
Maximum borrowing capacity	$ 30,000
Line of Credit
Floor Plan Payable
Maximum borrowing capacity	$ 70,000	$ 70,000
Applicable interest rate (as a percent)	4.65%	2.31%
Line of Credit | BSBY Rate
Floor Plan Payable
Variable rate spread (as a percent)	2.25%	2.25%
Line of Credit | BSBY Rate | In Case of BSBY Rate Loan
Floor Plan Payable
Variable rate spread (as a percent)	1.75%	1.75%
Line of Credit | Base Rate | In Case of Base Rate Loan
Floor Plan Payable
Variable rate spread (as a percent)	0.75%	0.75%
Line of Credit | Federal Funds Rate
Floor Plan Payable
Variable rate spread (as a percent)	0.50%	0.50%