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Goodwill and Intangible Assets | 9 Months Ended
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Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | Goodwill and Intangible AssetsThe carrying amount of goodwill was approximately $510.2 million and $525.8 million as of September 30, 2018 and December 31, 2017, respectively. The carrying amount of goodwill is net of accumulated impairment losses of approximately $797.6 million as of both September 30, 2018 and December 31, 2017. The carrying amount of franchise assets was approximately $67.8 million and $69.9 million as of September 30, 2018 and December 31, 2017, respectively. The changes in the carrying amount of both goodwill and franchise assets are related to the disposition of several franchised dealerships during the nine months ended September 30, 2018. At December 31, 2017, Sonic had approximately $4.7 million of definite life intangibles related to favorable lease agreements. After the effect of amortization of the definite life intangibles, the balance recorded at September 30, 2018 was approximately $4.2 million. Both franchise assets and favorable lease agreement assets are included in other intangible assets, net in the accompanying condensed consolidated balance sheets.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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