Inventories and Floor Plan Payables - Floor Plan Outstanding (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Floor Plan Payable
Less: outstanding letters of credit	$ (19,200)	$ (17,200)
Minimum
Floor Plan Payable
Floor plan payment due period	3 days	3 days
Maximum
Floor Plan Payable
Floor plan payment due period	10 days	10 days
Floor Plan Facility
Floor Plan Payable
Total commitment	$ 1,850,000	$ 1,850,000
Less: borrowings	(1,161,713)	(1,371,145)
Less: FLAIR offset account	(79,472)	(145,047)
Additional borrowing capacity	608,815	333,808
Less: short-term payable for sold inventory	(33,152)	(41,577)
Less: purchase commitments	(9,340)	(27,420)
Unencumbered borrowing capacity	566,323	264,811
Line of Credit | Floor Plan Facility
Floor Plan Payable
Total commitment	70,000	70,000
Less: borrowings		(20,885)
Additional borrowing capacity	70,000	49,115
Letters of credit | Floor Plan Facility
Floor Plan Payable
Total commitment	30,000	30,000
Less: outstanding letters of credit	(14,300)	(12,300)
Additional letters of credit capacity	$ 15,700	$ 17,700