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Goodwill and Franchise Value (Schedule of Goodwill) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2017 | Dec. 31, 2016
Goodwill [Roll Forward] |  |  |
Balance |  | $ 259,399 | $ 213,220
Goodwill adjustments | $ (2,200) | (2,214) | 47,397
Reductions through divestitures |  |  | (1,218)
Balance | 257,185 | 257,185 | 259,399
Domestic |  |  |
Goodwill [Roll Forward] |  |  |
Balance |  | 114,839 | 97,903
Goodwill adjustments |  | (817) | 18,154
Reductions through divestitures |  |  | (1,218)
Balance | 114,022 | 114,022 | 114,839
Import |  |  |
Goodwill [Roll Forward] |  |  |
Balance |  | 106,179 | 84,384
Goodwill adjustments |  | (1,006) | 21,795
Reductions through divestitures |  |  | 0
Balance | 105,173 | 105,173 | 106,179
Luxury |  |  |
Goodwill [Roll Forward] |  |  |
Balance |  | 38,381 | 30,933
Goodwill adjustments |  | (391) | 7,448
Reductions through divestitures |  |  | 0
Balance | $ 37,990 | $ 37,990 | $ 38,381

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e961-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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