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Inventories - Components of Inventories (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
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Inventory Disclosure [Abstract] |  |
New vehicles | $ 1,059,010 | $ 1,017,523
Used vehicles | 266,429 | 294,496
Service loaners | 136,844 | 130,406
Parts, accessories and other | 65,378 | 70,320
Net inventories | $ 1,527,661 | $ 1,512,745

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- Definition Inventory service loaners. + References No definition available. + Details
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- Definition Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date for elements of machinery or equipment held for the purpose of replacing similar parts in the course of repair or maintenance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.BB) -URI http://asc.fasb.org/extlink&oid=27011343&loc=d3e100047-122729 + Details
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