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Inventories - Components of Inventories (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
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Inventory Disclosure [Abstract] |  |
New vehicles | $ 278,200 | $ 273,100
Used vehicles | 730,800 | 807,200
Service loaners | 112,500 | 106,300
Parts, accessories and other | 76,600 | 74,600
Net inventories | $ 1,198,100 | $ 1,261,200

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