Credit Agreement (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jul. 01, 2011	Apr. 26, 2011
Line of Credit Facility [Line Items]
Committed and unsecured borrowings provided by the Agreement		$ 200,000
Committed and unsecured borrowings provided by the Agreement, Letter of credit		125,000
Credit Agreement (Textual) [Abstract]
Amount by which committed borrowing limit can be increased on approval of bank groups		100,000
Amount to which committed borrowing limit can be increased on approval of bank groups		300,000
Minimum margin on eurodollar rates based on fixed charge coverage grid	87.5
Maximum margin on eurodollar rates based on fixed charge coverage grid	175.0
Minimum commitment fees based on total commitment	12.5
Maximum commitment fees based on total commitment	25
Minimum fixed charge coverage ratio as per restated Revolving Credit Agreement	2.25:1
Minimum leverage ratio as per restated Revolving Credit Agreement	2:1
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Letter of Credit Outstanding	$ 1,595