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Selected Quarterly Financial Data (Unaudited) (Details Textual) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Dec. 31, 2016 USD ($) | Sep. 30, 2016 USD ($) | Jun. 30, 2016 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |
ASSET IMPAIRMENTS | $ 10,000 | $ 9,500 | $ 20,000 | $ 10,900 | $ 1,000 | $ 900 | $ 19,506 | $ 32,838 | $ 87,562
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | $ 9,800 | 9,500 | $ 19,200 | $ 10,600 |  | $ 200 | $ 19,300 | $ 30,000 | 30,100
Chargeback reserves for finance and insurance revenues |  | $ 14,700 |  |  |  |  |  |  |
Number of Franchises Disposed |  |  |  |  |  |  | 3 | 10 |
Net Gain (Loss) on Real Estate and Dealership Transactions |  |  |  |  |  |  |  | $ 2,200 |
Asset impairment charge on disposition |  |  |  |  |  |  |  | 600 |
U.S. |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |
ASSET IMPAIRMENTS |  |  |  |  |  |  | $ 12,762 | $ 21,794 | 18,983
Chargeback reserves for finance and insurance revenues |  |  |  |  |  |  | 6,600 |  |
Number of Franchises Disposed |  |  |  |  |  |  |  | 5 |
Net Gain (Loss) on Real Estate and Dealership Transactions |  |  |  |  |  |  |  | $ 2,700 |
U.S. | Pre-tax [Member] |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |
Net Gain (Loss) on Real Estate and Dealership Transactions |  |  |  |  |  |  |  | 2,700 | 8,900
U.S. | Net of taxes [Member] |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |
ASSET IMPAIRMENTS |  |  |  |  |  |  | 8,000 | 13,500 | 12,000
Net Gain (Loss) on Real Estate and Dealership Transactions |  |  |  |  |  |  |  | 1,700 | 5,500
U.K. |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |
ASSET IMPAIRMENTS |  |  |  |  |  |  | $ 0 | $ 201 | 330
Number of Franchises Disposed |  |  |  |  |  |  | 1 | 1 |
Net Gain (Loss) on Real Estate and Dealership Transactions |  |  |  |  |  |  |  | $ (300) |
Brazil |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |
ASSET IMPAIRMENTS |  |  |  |  |  |  | $ 6,744 | $ 10,843 | 68,249
Number of Franchises Disposed |  |  |  |  |  |  | 2 | 4 |
Net Gain (Loss) on Real Estate and Dealership Transactions |  |  |  |  |  |  |  | $ (800) |
Brazil | Pre-tax [Member] |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |
Net Gain (Loss) on Real Estate and Dealership Transactions |  |  |  |  |  |  |  | 800 |
Brazil | Net of taxes [Member] |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |
ASSET IMPAIRMENTS |  |  |  |  |  |  | $ 4,400 | $ 6,900 | $ 62,400

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