Operations and Summary of Significant Accounting Policies (Assumptions Used in Black-Scholes Pricing Model) (Details) - $ / shares	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Accounting Policies [Abstract]
Expected dividend yield	2.06%	2.40%	2.50%
Risk-free interest rate	1.44%	1.89%	1.12%
Weighted average expected life	4 years 6 months	6 years	6 years
Expected volatility	22.57%	31.22%	32.59%
Weighted average fair value per share of options granted	$ 5.03	$ 6.63	$ 6.22