Basis of Presentation and Summary of Significant Accounting Policies Narrative (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2012 weeks	Jun. 30, 2012 weeks
Minimum [Member]
Number of Weeks in Reporting Period	13
Number of Weeks in Fiscal Year, Range (in weeks)		52
Maximum [Member]
Number of Weeks in Reporting Period	26
Number of Weeks in Fiscal Year, Range (in weeks)		53