Acquisitions - Assets (Liabilities) Acquired (Assumed) at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets (liabilities) acquired (assumed) at fair value:
Goodwill	$ 153,105	$ 112,940	$ 61,053
Assets Or Stock Of Multiple Dealership Locations Acquired
Assets (liabilities) acquired (assumed) at fair value:
Accounts receivable	944
Inventory	36,285	75,664	6,228
Property and equipment	823	842	51
Intangibles	2,774
Goodwill	40,165	51,887	4,369
Security deposits		12
Other assets	175	19
Customer deposits		(1,111)	(33)
Accounts payable	(2,231)	(49)
Accrued expenses	(329)	(575)
Purchase price	$ 78,606	$ 126,689	$ 10,615

Amount of accrued liabilities assumed at the acquisition date.

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Amount of security deposits expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

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- Definition

Amount of customer deposits incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date.

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Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date.

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- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

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-Name Accounting Standards Codification
-Topic 805
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- Definition

The amount of inventory recognized as of the acquisition date.

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Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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- Definition

Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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