Valuation And Qualifying Accounts - Additional Information (Detail) (Trade Accounts Receivable, USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Trade Accounts Receivable
Valuation and Qualifying Accounts Disclosure [Line Items]
Recovery of accounts previously writen off	$ 110	$ 105	$ 213

Total of recoveries of amounts due the Entity that had previously been written off as uncollectible using allowances (the valuation accounts that are netted against the cost of an asset to value it at its carrying value) and total of reestablishments of reserves (liabilities established to represent expected future costs) that had previously been utilized.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690

Name:	us-gaap_ValuationAllowancesAndReservesRecoveries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration