Operations and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Jan. 02, 2016

Accounting Policies [Abstract]

Estimated useful lives of long-term depreciable assets

The following table summarizes the majority of our estimated useful lives of long-term depreciable assets:

	Useful Life
Buildings and building improvements	10-45 years
Land improvements	10-20 years
Machinery, equipment and computer systems	3-20 years
Furniture and fixtures	3-12 years
Trucks, trailers and automobiles	3-10 years

Assumptions Used in Black-Scholes Pricing Model

The following assumptions were used to determine the weighted average fair value of options granted during 2015, 2014 and 2013.

	2015			2014			2013
Assumptions used in Black-Scholes pricing model:
Expected dividend yield	2.06		%	2.40		%	2.50		%
Risk-free interest rate	1.44		%	1.89		%	1.12		%
Weighted average expected life	4.5 years			6.0 years			6.0 years
Expected volatility	22.57		%	31.22		%	32.59		%
Weighted average fair value per share of options granted	$	5.03		$	6.63		$	6.22