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Interim Financial Information (Details Textual) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 USD ($) dealerships town states | Mar. 31, 2015 USD ($) | Dec. 31, 2015 USD ($)
Business And Organization [Line Items] |  |  |
Deferred income taxes |  |  | $ 14,100
Debt Issuance Costs, Current Assets |  |  | 500
Number of Reportable Segments | 3 |  |
Immaterial Error of Effect of Exchange Rate on Cash and Cash Equivalents | $ 841 | $ (2,983) |
Net Cash Provided by (Used in) Operating Activities | $ 116,075 | $ 58,167 |
Number of domestic regions | 2 |  |
Number of international regions | 2 |  |
Debt Issuance Costs, Long-term Assets |  |  | 3,600
Variable Interest Entity [Line Items] |  |  |
Assets, Current | $ 2,254,079 |  | 2,188,370
Total assets | 4,533,846 |  | 4,396,716
Liabilities, Current | $ 2,103,353 |  | 2,039,268
Variable Interest Entity, Ownership Percentage | 8.00% |  |
Variable Interest Entity, Primary Beneficiary [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Assets, Current | $ 17,596 |  | 12,849
Long-Lived Assets | 12,106 |  | 11,022
Total assets | 29,702 |  | 23,871
Liabilities, Current | 13,950 |  | 8,257
Liabilities, Noncurrent | 18,820 |  | 17,064
Total liabilities | $ 32,770 |  | $ 25,321
East [Member] |  |  |
Business And Organization [Line Items] |  |  |
Number of dealerships | dealerships | 37 |  |
West [Member] |  |  |
Business And Organization [Line Items] |  |  |
Number of dealerships | dealerships | 77 |  |
U.S. [Member] |  |  |
Business And Organization [Line Items] |  |  |
Number of States in which Entity Operates | states | 14 |  |
U.K. [Member] |  |  |
Business And Organization [Line Items] |  |  |
Number of Towns in which Entity Operates | town | 19 |  |
Number of dealerships | dealerships | 29 |  |
Brazil [Member] |  |  |
Business And Organization [Line Items] |  |  |
Number of States in which Entity Operates | states | 3 |  |
Number of dealerships | dealerships | 17 |  |

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