Executive Officers' Separation and Hiring Costs - (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012 General and administrative expense
Seperation and Hiring Costs [Line Items]
Executive Officers' Separation and Hiring, Period Costs		$ 1.6
Seperation costs payable to the company's former executives	$ 2.4
Executive Officers' Separation and Hiring Payment Completion	2014