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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
	Feb. 29, 2012	Sep. 26, 2012	Sep. 28, 2011	Sep. 26, 2012	Sep. 28, 2011
Total share-based compensation [Abstract]
Total share-based compensation		$ 1,128,000	$ 1,031,000	$ 2,794,000	$ 3,180,000
Stock options [Member]
Total share-based compensation [Abstract]
Total share-based compensation		200,000	266,000	692,000	788,000
Unrecognized compensation cost [Abstract]
Unrecognized compensation cost related to unvested stock option awards outstanding		800,000		800,000
Unrecognized compensation cost, expected weighted average period				1 year 1 month 6 days
Restricted stock units [Member]
Total share-based compensation [Abstract]
Total share-based compensation		778,000	512,000	1,752,000	1,848,000
Restricted Stock Units [Abstract]
Equity awards granted (in shares)	0.4
Employee performance based target cash awards	2,000,000
Equity awards, grant date fair value (in dollars per share)	$ 6.05
Performance period	3 years
Minimum percentage of target awards to be earned (in hundredths)	0.00%
Maximum percentage of target awards to be earned (in hundredths)	200.00%
Cash payments				600,000
Common stock shares issued (in shares)				0.2
Unrecognized compensation cost [Abstract]
Unrecognized compensation cost related to all unvested restricted stock unit awards outstanding		3,600,000		3,600,000
Unrecognized compensation cost, expected weighted average period				1 year 5 months 19 days
Board deferred stock units [Member]
Total share-based compensation [Abstract]
Total share-based compensation		150,000	253,000	350,000	544,000
Restricted Stock Units [Abstract]
Equity awards granted (in shares)				0.1
Equity awards, grant date fair value (in dollars per share)				$ 4.05
Common stock shares issued (in shares)				0.1
Common stock shares issued upon conversion of equity awards				less than 0.1 million
Unrecognized compensation cost [Abstract]
Unrecognized compensation cost related to all unvested restricted stock unit awards outstanding		$ 300,000		$ 300,000
Unrecognized compensation cost, expected weighted average period				7 months 6 days

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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.

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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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Aggregate unrecognized cost of share-based awards, other than options, made to employees under an equity-based compensation plan, that have yet to vest.

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Aggregate unrecognized cost of option awards made to employees under a stock option plan or plans, that have yet to vest.

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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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