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Franchise Rights Acquired, Goodwill and Other Intangible Assets - Change in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 27, 2020 | Jun. 29, 2019 | Jun. 27, 2020 | Jun. 29, 2019
Goodwill [Line Items] |  |  |  |
Beginning balance |  |  | $ 157,916 |
Goodwill impairment | $ 0 | $ 0 | (3,665) | $ 0
Ending balance | 151,624 |  | 151,624 |
Kurbo Health, Inc. |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning balance |  |  | 157,916 |
Goodwill impairment |  |  | (3,665) |
Effect of exchange rate changes |  |  | (2,627) |
Ending balance | 151,624 |  | 151,624 |
Kurbo Health, Inc. | North America |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning balance |  |  | 143,940 |
Goodwill impairment |  |  | 0 |
Effect of exchange rate changes |  |  | (1,817) |
Ending balance | 142,123 |  | 142,123 |
Kurbo Health, Inc. | Continental Europe |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning balance |  |  | 7,015 |
Goodwill impairment |  |  | 0 |
Effect of exchange rate changes |  |  | 15 |
Ending balance | 7,030 |  | 7,030 |
Kurbo Health, Inc. | United Kingdom |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning balance |  |  | 1,213 |
Goodwill impairment |  |  | 0 |
Effect of exchange rate changes |  |  | (69) |
Ending balance | 1,144 |  | 1,144 |
Kurbo Health, Inc. | Other |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning balance |  |  | 5,748 |
Goodwill impairment |  |  | (3,665) |
Effect of exchange rate changes |  |  | (756) |
Ending balance | $ 1,327 |  | $ 1,327 |

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