Stockholders' Equity (Roll Forward Of Class A Common Shares Outstanding) (Details)	6 Months Ended
	Jul. 02, 2011	Jul. 03, 2010
Balance at the beginning of the year	55,711,325
Repurchases	2,100,000	1,684,537
Balance at the end of the period	54,170,138
Class A Common Shares [Member]
Balance at the beginning of the year	55,711,325	58,318,983
Repurchases	(2,100,000)	(1,684,537)
Stock option, rights and ESPP issuances	409,550	205,961
Restricted share issuances	209,168	375,279
Restricted share forfeitures	(8,445)	(14,627)
Shares withheld for tax obligations	(51,460)	(5,129)
Balance at the end of the period	54,170,138	57,195,930