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Restructuring and Asset Impairment - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 01, 2017 | Jun. 25, 2016 | Jul. 01, 2017 | Jun. 25, 2016 | Apr. 01, 2017 | Dec. 31, 2016 | Mar. 26, 2016 | Dec. 26, 2015
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance and retention costs liability | $ 4,004 | $ 3,678 | $ 4,004 | $ 3,678 | $ 3,451 | $ 3,680 | $ 2,521 | $ 2,969
Accelerated depreciation |  | $ 200 |  | $ 400 |  |  |  |
Impairment charges |  |  | 200 |  |  |  |  |
Other restructuring costs | 100 |  | 400 |  |  |  |  |
Accrued Compensation |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Severance and retention costs liability | $ 4,000 |  | $ 4,000 |  |  |  |  |

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