Significant Accounting Policies (Details)	9 Months Ended	12 Months Ended
	Oct. 01, 2011 Y week	Jan. 01, 2011 week
Significant Accounting Policies
Number of weeks in fiscal year, low end of the range	52
Number of weeks in fiscal year, high end of the range	53
Number of weeks in fiscal year	52	52
Number of weeks in each fiscal quarter for 52-week fiscal year	13