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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 29, 2020
Goodwill and Intangible Assets |
Schedule of changes in the carrying amount of goodwill and intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Goodwill | ​ | Intangible Assets | ​
Balance as of December 25, 2018 (1) | $ | 123,220 | ​ | $ | 1,959 | ​
Additions |  | 1,528 | ​ | ​ | — | ​
Amortization expense |  | — | ​ | ​ | (725) | ​
Disposals and other, net |  | — | ​ |  | — | ​
Impairment |  | — | ​ |  | — | ​
Balance as of December 31, 2019 | $ | 124,748 | ​ | $ | 1,234 | ​
Additions |  | 3,329 | ​ | ​ | 1,600 | ​
Amortization expense |  | — | ​ | ​ | (563) | ​
Disposals and other, net |  | — | ​ | ​ | — | ​
Impairment |  | (1,076) | ​ | ​ | — | ​
Balance as of December 29, 2020 | $ | 127,001 | ​ | $ | 2,271 | ​
(1) | Net of $4.8 million of accumulated goodwill impairment losses.

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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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