Business Acquisitions and Dispositions - Additional Information (Detail) $ in Millions |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
|
Sep. 30, 2016
USD ($)
Business
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Sep. 30, 2016
USD ($)
Business
Franchise
|
Sep. 30, 2015
USD ($)
Franchise
|
|
| Business Acquisition [Line Items] | |||
| Number of businesses acquired | Franchise | 0 | ||
| Number of franchises disposed | Franchise | 0 | 1 | |
| Net cash generated from disposition | $ | $ 1.3 | ||
| Stand-alone Used Vehicle Dealership Business [Member] | |||
| Business Acquisition [Line Items] | |||
| Number of businesses acquired | Business | 3 | 3 | |
| Stand-alone Used Vehicle Dealership Business and Real Estate [Member] | |||
| Business Acquisition [Line Items] | |||
| Business acquisition, consideration amount | $ | $ 15.9 | $ 15.9 | |
| X | ||||||||||
- Definition Number of franchises disposed. No definition available.
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| X | ||||||||||
- Definition Proceeds from dispositions of franchises. No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The number of businesses acquired by the entity during the period. No definition available.
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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