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Inventories, Net (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017
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Inventory Disclosure [Abstract] |  |  |
New vehicles | $ 1,278,863 |  | $ 1,194,632
Used vehicles | 350,219 |  | 350,760
Rental vehicles | 142,926 |  | 144,213
Parts, accessories and other | 80,556 |  | 82,755
Total inventories | 1,852,564 |  | 1,772,360
Less: lower of cost or net realizable value allowance | 8,505 |  | 9,067
Inventories, net | $ 1,844,059 | $ 1,759,633 | $ 1,763,293

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