Inventories and Related Notes Payable - Floor Plan - Components of Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Inventory Disclosure [Abstract]
New vehicles	$ 1,146,000	$ 799,600
Used vehicles	514,400	505,700
Service loaners (1)	184,900	172,700
Parts, accessories and other	112,400	100,300
Inventories	$ 1,957,700	$ 1,578,300