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Operating (Gains), Losses and Other Charges, Net (Details) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 26, 2014 | Mar. 27, 2013 | Dec. 25, 2013
Operating (gains), losses and other charges, net [Abstract] |  |  |  |
(Gains) losses on sales of assets and other, net | $ (8,000) |  | $ 18,000 |
Restructuring charges and exit costs | 430,000 |  | 116,000 |
Impairment charges | 0 |  | 0 |
Operating (gains), losses and other charges, net | 422,000 |  | 134,000 |
Restructuring charges and exit costs [Abstract] |  |  |  |
Exit costs | 54,000 | [1] | 56,000 |
Severance and other restructuring charges | 376,000 |  | 60,000 |
Total restructuring charges and exit costs | 430,000 |  | 116,000 |
Components of change in accrued exit cost liabilities [Roll Forward] |  |  |  |
Balance at December 25, 2013 | 3,149,000 |  |  |
Exit costs | 54,000 | [1] | 56,000 |
Payments, net of sublease receipts | (355,000) |  |  |
Interest accretion | 52,000 |  |  |
Balance, March 26, 2014 | 2,900,000 |  |  |
Less current portion included in other current liabilities | 1,182,000 |  |  |
Long-term portion included in other noncurrent liabilities | 1,718,000 |  |  |
Estimated net cash payments related to exit cost liabilities [Abstract] |  |  |  |
Remainder of 2014 | 1,082,000 |  |  |
2015 | 566,000 |  |  |
2016 | 295,000 |  |  |
2017 | 296,000 |  |  |
2018 | 299,000 |  |  |
Thereafter | 986,000 |  |  |
Total | 3,524,000 |  |  |
Less imputed interest | 624,000 |  |  |
Present value of exit cost liabilities | 2,900,000 |  |  |
Accrued severance and other restructuring charges | $ 200,000 |  |  | $ 100,000
Period of accrued severance and other restructuring charges, maximum | 12 months |  |  |
[1] | Included as a component of operating (gains), losses and other charges, net.

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