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Significant Accounting Policies - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 29, 2012 | Dec. 31, 2011 | Dec. 25, 2010
Significant Accounting Policies [Line Items] |  |  |
Stock options excluded from calculation of diluted earnings per share, antidilutive | 321,000 | 220,244 | 1,349,313
Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Other intangible assets, estimated useful life | 5 years |  |
Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Other intangible assets, estimated useful life | 10 years |  |
Buildings And Improvements |  |  |
Significant Accounting Policies [Line Items] |  |  |
Depreciated life | 30 |  |
Trailing Equipment | Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Depreciated life | 7 years |  |
Trailing Equipment | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Depreciated life | 10 years |  |
Hardware And Software | Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Depreciated life | 3 years |  |
Hardware And Software | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Depreciated life | 7 years |  |
Commercial Trucking Claims |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | 5,000,000 |  |
General Liability Claim |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | 1,000,000 |  |
Workers' Compensation Claim |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | 250,000 |  |
Cargo Claim |  |  |
Significant Accounting Policies [Line Items] |  |  |
Company retained liability per claim | 250,000 |  |

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- Definition Self Insurance Retained Liability + References No definition available. + Details
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 07-4 -Paragraph 4 -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 Accounting Standards Codification -Glossary Diluted Earnings Per Share -URI http://asc.fasb.org/extlink&oid=6510752 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingent Stock Agreement -URI http://asc.fasb.org/extlink&oid=6508534 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 -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 Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph 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. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 13, 14 -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 Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2155824 + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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