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Share-Based Compensation (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 31, 2013	Sep. 25, 2013	Sep. 26, 2012	Sep. 25, 2013	Sep. 26, 2012
Total share-based compensation [Abstract]
Total share-based compensation		$ 1,053,000	$ 1,128,000	$ 3,434,000	$ 2,794,000
Performance shares [Member]
Total share-based compensation [Abstract]
Total share-based compensation		735,000	778,000	2,377,000	1,752,000
Restricted Stock Units [Abstract]
Equity awards granted (in shares)	0.3
Employee performance based target cash awards	2,100,000
Equity awards, grant date fair value (in dollars per share)	$ 8.05
Performance period	3 years
Cash payments				900,000
Maximum common stock shares issued (in shares)				0.3
Unrecognized compensation cost [Abstract]
Unrecognized compensation cost related to all unvested restricted stock unit awards outstanding		5,000,000		5,000,000
Unrecognized compensation cost, expected weighted average period				1 year 4 months 28 days
Stock options [Member]
Total share-based compensation [Abstract]
Total share-based compensation		136,000	200,000	433,000	692,000
Unrecognized compensation cost [Abstract]
Unrecognized compensation cost related to unvested stock option awards outstanding		200,000		200,000
Unrecognized compensation cost, expected weighted average period				0 years 3 months 22 days
Restricted stock units [Member]
Total share-based compensation [Abstract]
Total share-based compensation		182,000	150,000	624,000	350,000
Restricted Stock Units [Abstract]
Equity awards granted (in shares)				0.1
Equity awards, grant date fair value (in dollars per share)				$ 5.95
Maximum common stock shares issued (in shares)				0.1
Unrecognized compensation cost [Abstract]
Unrecognized compensation cost related to all unvested restricted stock unit awards outstanding		$ 400,000		$ 400,000
Unrecognized compensation cost, expected weighted average period				0 years 7 months 0 days
Minimum [Member] | Performance shares [Member]
Restricted Stock Units [Abstract]
Minimum percentage of target awards to be earned (in hundredths)	0.00%
Maximum [Member] | Performance shares [Member]
Restricted Stock Units [Abstract]
Maximum percentage of target awards to be earned (in hundredths)	200.00%

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- Definition

Represents cash awards granted to certain employees on the basis on performance during the period.

+ References

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Description of the maximum percentage of performance shares and cash target awards that could be earned.

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Description of the minimum percentage of performance shares and cash target awards that could be earned.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

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Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Unrecognized cost of unvested options awarded to employees as compensation.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Number of share instruments newly issued under a share-based compensation plan.

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