Investor Information (Details) (USD $)	3 Months Ended												12 Months Ended
	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Jan. 01, 2011	Oct. 02, 2010	Jul. 03, 2010	Apr. 03, 2010	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010	Jan. 03, 2009
Investor Information [Abstract]
Market Price, High	$ 30.24	$ 32.02	$ 27.95	$ 32.01	$ 27.75	$ 26.40	$ 32.78	$ 36.48	$ 33.12	$ 29.68	$ 35.29	$ 28.60	$ 32.02	$ 36.48	$ 35.29	$ 29.40	$ 37.97
Market Price, Low	$ 25.08	$ 25.39	$ 21.57	$ 24.97	$ 17.14	$ 15.78	$ 22.04	$ 28.42	$ 23.97	$ 22.80	$ 25.13	$ 23.19	$ 21.57	$ 15.78	$ 22.80	$ 7.70	$ 9.09
Common Stock, Dividends per Share	$ 0.24	$ 0.24	$ 0.24	$ 0.23	$ 0.23	$ 0.23	$ 0.23	$ 0.23	$ 0.215	$ 0.215	$ 0.215	$ 0.215	$ 0.95	$ 0.92	$ 0.86
Diluted Earnings per Share	$ 0.39	$ 0.53	$ 0.15	$ 0.00	$ 0.40	$ 0.55	$ 0.10	$ (0.04)	$ 0.27	$ 0.34	$ 0.10	$ (0.13)	$ 1.07	$ 1.01	$ 0.59	$ (0.14)	$ 1.02
Price/Earnings Ratio, High													30	36	60	(210)	37
Price/Earnings Ratio, Low													20	16	39	(55)	9
Price/Earnings Ratio, High, Five-Years Average													(9)
Price/Earnings Ratio, Low, Five-Years Average													6