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Operating (Gains), Losses and Other Charges, Net (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 27, 2017 | Dec. 28, 2016 | Dec. 30, 2015
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Pension settlement loss | $ 21 |  | $ 24,297 |  |
Software implementation costs | 5,247 |  | 0 |  | $ 0
(Gains) losses on sales of assets and other, net | (1,729) |  | 29 |  | (93)
Restructuring charges and exit costs | 485 |  | 1,486 |  | 1,524
Impairment charges | 326 |  | 1,098 |  | 935
Operating (gains), losses and other charges, net | 4,329 |  | 26,910 |  | 2,366
Restructuring charges and exit costs [Abstract] |  |  |  |  |
Exit costs | 385 | [1] | 591 | [1] | 697
Severance and other restructuring charges | 100 |  | 895 |  | 827
Total restructuring charges and exit costs | 485 |  | 1,486 |  | 1,524
Components of change in accrued exit cost liabilities [Roll Forward] |  |  |  |  |
Balance, beginning of year | 1,896 |  | 2,043 |  |
Exit costs | 385 | [1] | 591 | [1] | 697
Payments, net of sublease receipts | (1,189) |  | (855) |  |
Interest accretion | 88 |  | 117 |  |
Balance, end of year | 1,180 |  | 1,896 |  | 2,043
Less current portion included in other current liabilities | 345 |  | 330 |  |
Long-term portion included in other noncurrent liabilities | 835 |  | 1,566 |  |
Accrued severance and other restructuring charges | 100 |  | 400 |  |
Estimated net cash payments related to exit cost liabilities [Abstract] |  |  |  |  |
2018 | 414 |  |  |  |
2019 | 264 |  |  |  |
2020 | 179 |  |  |  |
2021 | 180 |  |  |  |
2022 | 180 |  |  |  |
Thereafter | 168 |  |  |  |
Total | 1,385 |  |  |  |
Less imputed interest | 205 |  |  |  |
Present value of exit cost liabilities | 1,180 |  |  |  |
Existing sublease arrangements | 1,400 |  |  |  |
Impairment charges | 326 |  | 1,098 |  | 935
Pension Plan [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Pension settlement loss | $ 0 |  | $ 24,297 |  | $ 0
[1] | Included as a component of operating (gains), losses and other charges, net.

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