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Fair Value of Assets and Liabilities - Details of impairment of long-lived assets held and used by asset (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 26, 2020 | Dec. 28, 2019 | Dec. 29, 2018
Goodwill |  |  |
Goodwill | $ 816,812 | $ 820,589 | $ 826,715
Fair Value, Nonrecurring |  |  |
Goodwill |  |  |
Impairment charge | 33,841 |  |
Fair Value, Nonrecurring | Estimated Fair Value | Level 3 |  |  |
Goodwill |  |  |
Goodwill | 8,953 |  |
Fair Value, Nonrecurring | Carrying Value | Level 3 |  |  |
Goodwill |  |  |
Goodwill | $ 9,832 |  |

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. + References No definition available. + Details
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