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Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 29, 2019 | Jun. 30, 2018 | Dec. 29, 2018
Changes in the carrying amount of goodwill |  |  |
Balance at the beginning of the period, Goodwill gross | $ 164,625 |  |
Balance at the end of the period, Goodwill gross | 164,625 |  |
Balance at the beginning of the period, Accumulated impairment losses | (76,417) |  |
Balance at the end of the period, Accumulated impairment losses | (76,417) |  |
Goodwill, net | 88,208 |  | $ 88,208
Balance at the end of the period, Goodwill, net | 88,208 |  |
Intangible assets impairment losses | $ 0 | $ 0 |

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