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Income Taxes (Narrative) (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 26, 2012 | Dec. 28, 2011 | Dec. 29, 2010
Valuation Allowance [Line Items] |  |  |
Release Of Valuation Allowance | $ 661,000 | $ 89,102,000 | $ 0
Unrecognized Tax Benefits | 0 | 0 |
Effective Income Tax Reconciliation Change In And Release Of Valuation Allowance | (2.00%) | (315.00%) | (24.00%)
Tax benefit recognized | (700,000) | (89,100,000) |
Valuation Allowance, amount credited to paid-in capital | 2,000,000 |  |
(Reductions) of the statutory provision related to the reversal or change of valuation allowances | 0.00% | 0.00% | (24.00%)
Out-of-period discrete tax adjustment | 1,700,000 |  |
Tax credit carryforward | 35,105,000 | 35,769,000 |
Alternative minimum tax credit carryforwards | 12,948,000 | 12,409,000 |
South Carolina net operating loss carryforwards | 73.00% |  |
State Credits Related To Prior Year Activity [Member] |  |  |
Valuation Allowance [Line Items] |  |  |
Out-of-period discrete tax adjustment | (1,600,000) |  |
General Business Tax Credit Carryforward [Member] |  |  |
Valuation Allowance [Line Items] |  |  |
Tax credit carryforward | 37,200,000 |  |
Net operating loss carryforwards unrecognized | 3,700,000 |  |
Alternative Minimum Tax Credit Carryforward [Member] |  |  |
Valuation Allowance [Line Items] |  |  |
Alternative minimum tax credit carryforwards | 12,900,000 |  |
Regular NOL Carryforwards [Member] |  |  |
Valuation Allowance [Line Items] |  |  |
NOL carryforwards | 500,000 |  |
AMT NOL Carryforwards [Member] |  |  |
Valuation Allowance [Line Items] |  |  |
NOL carryforwards | 117,000,000 |  |
Regular NOL and AMT NOL Carryforwards [Member] |  |  |
Valuation Allowance [Line Items] |  |  |
Net operating loss carryforwards unrecognized | 500,000 |  |
Regular NOL Carryforwards [Member] |  |  |
Valuation Allowance [Line Items] |  |  |
Tax benefit recognized |  |  | 1,100,000
(Reductions) of the statutory provision related to the reversal or change of valuation allowances |  |  | 5.00%
Temporary differences [Member] |  |  |
Valuation Allowance [Line Items] |  |  |
Tax benefit recognized |  |  | (7,200,000)
(Reductions) of the statutory provision related to the reversal or change of valuation allowances |  |  | (30.00%)
Other Items [Member] |  |  |
Valuation Allowance [Line Items] |  |  |
Tax benefit recognized |  |  | $ 300,000
(Reductions) of the statutory provision related to the reversal or change of valuation allowances |  |  | 1.00%

X
- Definition The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to changes in the valuation allowance for deferred tax assets and the release of the valuation allowance + References No definition available. + Details
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- Definition The amount of change in the period in the valuation allowance due to the determination that it is more likely than not that certain deferred tax assets will be utilized. + References No definition available. + Details
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- Definition The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to changes in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=6889476&loc=d3e330036-122817 + Details
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- Definition The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -Subparagraph a -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 Reflects the effects of adjustments of previously recorded tax expense, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, IRS tax settlement and unusual repatriation of foreign earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 10A, 10B, 10C -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 10 -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. + Details
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- Definition The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a -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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