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Capital Transactions - Additional Information (Detail) - USD ($) $ in Thousands |  | 9 Months Ended
--- | --- | ---
Apr. 30, 2008 | Sep. 29, 2019 | Sep. 30, 2018
Capital Transactions [Line Items] |  |  |
Share based compensation |  | $ 2,045 | $ 4,494
Long-Term Performance Equity Plan [Member] |  |  |
Capital Transactions [Line Items] |  |  |
Award settled in cash or shares, average closing prices of shares during trading days of performance period |  | 20 days |
Long-Term Performance Equity Plan [Member] | Selling, Delivery and Administrative Expenses [Member] |  |  |
Capital Transactions [Line Items] |  |  |
Share based compensation |  | $ 10,300 | $ 1,500
Class B Common Stock [Member] |  |  |
Capital Transactions [Line Items] |  |  |
Term of performance unit award agreement | 10 years |  |
Performance unit award agreement expiration period | 2018 |  |

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- Definition Award settled in cash or shares based on average closing prices of common shares during trading days performance period. + References No definition available. + Details
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- Definition Capital transactions. + References No definition available. + Details
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- Definition Performance unit award agreement expiration period. + References No definition available. + Details
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- Definition Term of performance unit award agreement. + References No definition available. + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Details
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- Details
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- Details
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