Significant Accounting Policies (Details)	9 Months Ended	12 Months Ended
	Sep. 29, 2012	Dec. 29, 2012	Dec. 31, 2011
Basis of Presentation and Principles of Consolidation
Length of fiscal year		364 days	364 days
Number of days in each fiscal quarter for 52-week fiscal year	91 days
Minimum
Basis of Presentation and Principles of Consolidation
Length of fiscal year	364 days
Maximum
Basis of Presentation and Principles of Consolidation
Length of fiscal year	371 days