Stock-Based Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jan. 02, 2015	Jan. 03, 2014	Dec. 28, 2012
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Compensation and related expenses	$ 12,578us-gaap_OtherLaborRelatedExpenses	$ 12,757us-gaap_OtherLaborRelatedExpenses	$ 11,984us-gaap_OtherLaborRelatedExpenses
General and administrative expenses	501	411	394
Total stock-based compensation expense	13,079us-gaap_ShareBasedCompensation	13,168us-gaap_ShareBasedCompensation	12,378us-gaap_ShareBasedCompensation
Income tax benefit	5,141	5,195	4,844
Restricted Stock [Member]
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Compensation and related expenses	11,889	11,680	11,345
General and administrative expenses	501	411	394
Employee Stock Option [Member]
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Compensation and related expenses	$ 689	$ 1,077	$ 639

Income tax benefit associated with stock-based compensation.

No definition available.

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- Definition

The sum of expenses not otherwise specified in the taxonomy for managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.4)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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- Definition

Amount of payroll tax expense, compensation, postemployment and benefit-related expenses not elsewhere specified in the taxonomy (such as health plan, profit sharing, incentives, tuition reimbursement, other fringe benefits and perquisites) incurred in the period.

+ References

+ Details

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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- Details

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- Details

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