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Intangible Assets and Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in Carrying Amount of Franchise Assets and Goodwill | The changes in the carrying amount of franchise assets and goodwill for 2020 and 2019 were as follows:
| Franchise Assets |  | Net Goodwill |
| (In thousands) |
Balance at December 31, 2018 | $ | 65,700 |  |  | $ | 509,592 |  | (1)
Reductions from dispositions | (1,400) |  |  | (33,801) |  |
Balance at December 31, 2019 | $ | 64,300 |  |  | $ | 475,791 |  | (1)
Additions through current year acquisitions | — |  |  | 6,680 |  |
Reductions from dispositions | — |  |  | (494) |  |
Reductions from impairment | — |  |  | (268,000) |  |
Balance at December 31, 2020 | $ | 64,300 |  |  | $ | 213,977 |  | (2)
(1)Net of accumulated impairment losses of $796.7 million. (2)Net of accumulated impairment losses of $1.1 billion.

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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