Basis of Presentation and Significant Accounting Policies (Details)	9 Months Ended
	Sep. 27, 2011 segment officer statement rent month quarter
Basis of Presentation and Significant Accounting Policies
Determination of impairment testing based on cash flow negativeness for specified number of quarters (in quarters)	4
Number of continuous statements presented by the entity to reflect the net income, total net income, components of other comprehensive income and total of other comprehensive income	1
Number of statements presented by the entity to reflect the net income, total net income, components of other comprehensive income and total of other comprehensive income	2