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Operating (Gains), Losses and Other Charges, Net (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 26, 2018 | Dec. 27, 2017 | Dec. 28, 2016
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Pension settlement loss |  |  | $ 21 |  | $ 24,297
Software implementation costs | $ 0 |  | 5,247 |  | 0
(Gains) losses on sales of assets and other, net | (513) |  | (1,729) |  | 29
Restructuring charges and exit costs | 1,575 |  | 485 |  | 1,486
Impairment charges | 1,558 |  | 326 |  | 1,098
Operating (gains), losses and other charges, net | 2,620 |  | 4,329 |  | 26,910
(Gain) on insurance settlements | (1,200) |  |  |  |
(Gain) loss on sale of restaurants | 700 |  | 300 |  | (600)
Restructuring charges and exit costs [Abstract] |  |  |  |  |
Exit costs | 518 | [1] | 385 | [1] | 591
Severance and other restructuring charges | 1,057 |  | 100 |  | 895
Total restructuring charges and exit costs | 1,575 |  | 485 |  | 1,486
Components of change in accrued exit cost liabilities [Roll Forward] |  |  |  |  |
Balance, beginning of year | 1,180 |  | 1,896 |  |
Exit costs | 518 | [1] | 385 | [1] | 591
Payments, net of sublease receipts | (615) |  | (1,189) |  |
Interest accretion | 72 |  | 88 |  |
Balance, end of year | 1,155 |  | 1,180 |  | 1,896
Less current portion included in other current liabilities | 546 |  | 345 |  |
Long-term portion included in other noncurrent liabilities | 609 |  | 835 |  |
Accrued severance and other restructuring charges | 600 |  | 100 |  |
Estimated net cash payments related to exit cost liabilities [Abstract] |  |  |  |  |
2019 | 532 |  |  |  |
2020 | 177 |  |  |  |
2021 | 178 |  |  |  |
2022 | 178 |  |  |  |
2023 | 166 |  |  |  |
Thereafter | 0 |  |  |  |
Total | 1,231 |  |  |  |
Less imputed interest | 76 |  |  |  |
Present value of exit cost liabilities | 1,155 |  |  |  |
Existing sublease arrangements | 1,200 |  |  |  |
Impairment charges | 1,558 |  | 326 |  | 1,098
Pension Plan [Member] |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Pension settlement loss | $ 0 |  | $ 0 |  | $ 24,297
[1] | Included as a component of operating (gains), losses and other charges, net.

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