Inventories - Components of Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Inventory Disclosure [Abstract]
New vehicles	$ 560,500	$ 449,300
Used vehicles	648,200	534,000
Service loaners	152,200	143,800
Parts, accessories and other	101,700	89,700
Net inventories	$ 1,462,600	$ 1,216,800