Interim Reporting (Details)	6 Months Ended
Jul. 01, 2012
Minimum [Member]
Operating period (days)	P130D
Maximum [Member]
Operating period (days)	P140D

Entity's operating cycle if it is other than 12 months.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 926

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6473108&loc=d3e54406-107959

Name:	us-gaap_OperatingCycle
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration