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Retirement Plan - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 29, 2012 | Dec. 31, 2011 | Dec. 25, 2010
Retirement Plans [Line Items] |  |  |
Defined contribution plan maximum employee contribution as a percentage of base salary | 75.00% |  |
Expense for the Company-sponsored defined contribution plan | $ 1,809,000 | $ 1,754,000 | $ 1,663,000
First 3% Of Contributions On Defined Contribution Plan |  |  |
Retirement Plans [Line Items] |  |  |
Defined contribution plan employer contribution as a percentage of base salary | 100.00% |  |
Threshold to determine company matching percentage | 3.00% |  |
Next 2% Of Contributions On Defined Contribution Plan |  |  |
Retirement Plans [Line Items] |  |  |
Defined contribution plan employer contribution as a percentage of base salary | 50.00% |  |
Threshold to determine company matching percentage | 2.00% |  |

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- Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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