The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph g

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Name:	us-gaap_DefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Company Contributions (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Defined Contribution Benefit Plans [Line Items]
Expected company contribution	$ 867
401K (DC Plan)
Defined Contribution Benefit Plans [Line Items]
Contribution of company to company pension plans	958	853	635
Required \| Net Periodic Pension Cost
Defined Contribution Benefit Plans [Line Items]
Contribution of company to company pension plans	9,430	7,983	461
Discretionary
Defined Contribution Benefit Plans [Line Items]
Contribution of company to company pension plans	9,100
Discretionary \| Net Periodic Pension Cost
Defined Contribution Benefit Plans [Line Items]
Contribution of company to company pension plans	$ 9,149	$ 5,331	$ 448