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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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- 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 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph g(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809 + Details
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- Definition Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph j -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition 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). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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