Deferred Compensation and Other Benefits Deferred Compensation for Non-Employees (Details) (Key Employee Non Qualified Deferred Compensation Plan)	6 Months Ended
	Jun. 28, 2013 director
Key Employee Non Qualified Deferred Compensation Plan
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Number of directors receiving cash contributions	1