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Operating (Gains), Losses and Other Charges, Net (Details) (USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 25, 2013 | Sep. 26, 2012 | Sep. 25, 2013 | Sep. 26, 2012 | Dec. 26, 2012
Operating (gains), losses and other charges, net [Abstract] |  |  |  |  |  |
(Gains) losses on sales of assets and other, net | $ (68,000) | $ 91,000 | $ (83,000) |  | $ (6,772,000) |
Restructuring charges and exit costs | 229,000 | 821,000 | 1,005,000 |  | 2,970,000 |
Impairment charges | 0 | 2,468,000 | 857,000 |  | 3,008,000 |
Operating (gains), losses and other charges, net | 161,000 | 3,380,000 | 1,779,000 |  | (794,000) |
Restructuring charges and exit costs [Abstract] |  |  |  |  |  |
Exit costs | 198,000 | 233,000 | 435,000 | [1] | 1,139,000 |
Severance and other restructuring charges | 31,000 | 588,000 | 570,000 |  | 1,831,000 |
Total restructuring charges and exit costs | 229,000 | 821,000 | 1,005,000 |  | 2,970,000 |
Components of change in accrued exit cost liabilities [Roll Forward] |  |  |  |  |  |
Balance at December 26, 2012 |  |  | 4,061,000 |  |  |
Exit costs | 198,000 | 233,000 | 435,000 | [1] | 1,139,000 |
Payments, net of sublease receipts |  |  | (1,248,000) |  |  |
Interest accretion |  |  | 195,000 |  |  |
Balance, September 25, 2013 | 3,443,000 |  | 3,443,000 |  |  |
Less current portion included in other current liabilities | 1,228,000 |  | 1,228,000 |  |  |
Long-term portion included in other noncurrent liabilities | 2,215,000 |  | 2,215,000 |  |  |
Estimated net cash payments related to exit cost liabilities [Abstract] |  |  |  |  |  |
Remainder of 2013 | 270,000 |  | 270,000 |  |  |
2014 | 1,319,000 |  | 1,319,000 |  |  |
2015 | 545,000 |  | 545,000 |  |  |
2016 | 320,000 |  | 320,000 |  |  |
2017 | 322,000 |  | 322,000 |  |  |
Thereafter | 1,338,000 |  | 1,338,000 |  |  |
Total | 4,114,000 |  | 4,114,000 |  |  |
Less imputed interest | 671,000 |  | 671,000 |  |  |
Present value of exit cost liabilities | 3,443,000 |  | 3,443,000 |  |  |
Accrued severance and other restructuring charges | 100,000 |  | 100,000 |  |  | 500,000
Period of accrued severance and other restructuring charges, maximum |  |  | 12 months |  |  |
Impairment charges | $ 0 | $ 2,468,000 | $ 857,000 |  | $ 3,008,000 |
[1] | (1)Included as a component of operating (gains), losses and other charges, net.

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