Stockholders' Equity (Details 7) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011
Common Stock:
Balance at beginning of year	51,712,674	50,617,795
Shares issued upon exercise of stock options	$ 322,391	$ 885,905
Shares issued upon vesting of restricted stock grants	144,658	202,941
Shares issued to directors/other	$ 5,007	$ 6,033
Balance at end of year	52,184,730	51,712,674
Treasury Stock:
Balance at beginning of year	7,445,166	4,939,729
Purchases of Common Stock (a)	4,345,262	2,505,437
Balance at end of year	11,790,428	7,445,166