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Acquisitions and Dispositions (Details textuals) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Acquisitions and Dispositions (Textual) [Abstract] |  |  |
Number of franchises disposed | 10 |  |
Business Acquisition, Cost of Acquired Entity, Purchase Price | $ 61,200 |  |
Cash received in acquisition | 3,900 |  |
Proceeds From Disposition Of Franchise Property And Equipment | 36,843 | $ 41,581 | $ 144,597
Payments to Acquire Businesses, Net of Cash Acquired | 57,327 | 212,252 | $ 336,551
Net Gain (Loss) on Real Estate and Dealership Transactions | $ 2,200 | $ 8,200 |
Brazil |  |  |
Acquisitions and Dispositions (Textual) [Abstract] |  |  |
Number Of Dealerships Acquired | 1 |  |
Number of franchises disposed | 4 | 2 |
Number of franchises awarded | 2 |  |
Number of franchises acquired | 1 |  |
Number Of Dealerships Opened | 2 |  |
Net Gain (Loss) on Real Estate and Dealership Transactions | $ (800) |  |
U.S. |  |  |
Acquisitions and Dispositions (Textual) [Abstract] |  |  |
Number Of Dealerships Acquired |  | 3 |
Number of dealerships disposed |  | 2 |
Number of franchises disposed | 5 | 1 |
Net Gain (Loss) on Real Estate and Dealership Transactions | $ 2,700 | $ 9,400 |
U.K. |  |  |
Acquisitions and Dispositions (Textual) [Abstract] |  |  |
Number Of Dealerships Acquired | 12 |  |
Number of franchises disposed | 1 |  |
Number of franchises awarded | 2 |  |
Number of franchises acquired | 15 |  |
Number Of Dealerships Opened | 2 |  |
Net Gain (Loss) on Real Estate and Dealership Transactions | $ (300) |  |

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