Stock-Based Compensation (Tables)

6 Months Ended

Jul. 04, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of stock-based compensation expense under all share-based payment plans [Table Text Block]

Stock-based compensation expense under all share-based payment plans -- our Employee Stock Purchase Plan, stock option plans, stock-settled stock appreciation rights and performance-based restricted stock units -- included in the results of operations follows:

	Three months ended				Six Months Ended
	July 4, 2015		June 28, 2014		July 4, 2015		June 28, 2014
Compensation expense, all share-based payment plans	$	557	$	472	$	1,055	$	892

Schedule of share-based compensation, stock-settled stock appreciation rights award activity [Table Text Block]

The following table summarizes our SSARs as of July 4, 2015.

Stock-Settled Stock Appreciation Rights	Number of Rights		Weighted- Average Award Date Value		Weighted- Average Remaining Contractual Life	Unrecognized Compensation Cost		Aggregate Intrinsic Value
Unvested, January 1, 2015	303,271		$	3.84
Granted	133,550		5.78
Forfeited	—		—
Vested	(83,484	)	3.65
Unvested, July 4, 2015	353,337		$	4.62	3.1 years	$	1,409	$	10,636
Employee SSARs	344,338		$	4.67	3.2 years	$	1,391	$	10,365
Nonemployee Director SSARs	8,999		$	2.23	1.3 years	$	18	$	271

Schedule of share-based compensation, performance-based restricted stock units award activity [Table Text Block]

The following table summarizes performance-based restricted stock units as of July 4, 2015.

G. Stock-Based Compensation (continued)

Performance-Based Restricted Stock Units	Number of Stock Units		Weighted- Average Grant Date Value		Weighted- Average Remaining Contractual Life	Unrecognized Compensation Cost		Aggregate Intrinsic Value
Unvested, January 1, 2015	117,709		$	21.14
Granted	42,152		29.14
Forfeited	—		—
Vested	(10,533	)	15.42
Unvested, July 4, 2015	149,328		$	23.80	3.0 years	$	2,345	$	4,495

Schedule of share-based payment award, stock options, valuation assumptions [Table Text Block]

The fair values of stock-based awards granted were estimated at the dates of grant with the following weighted-average assumption.

	Six Months Ended
	July 4, 2015		June 28, 2014
Volatility rate	10.9	%	11.2	%
Risk-free interest rate	2.1	%	2.6	%
Expected dividend yield	.7	%	1.5	%
Expected life of awards (years)	9.3		8.7

Schedule of share-based compensation, stock options activity [Table Text Block]

The following table summarizes activity under the stock option plans for the six months endedJuly 4, 2015.

Stock Options	Number of Options Outstanding		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life	Aggregate Intrinsic Value
Outstanding, January 1, 2015	770,131		$	19.33
Granted	148,000		30.10
Exercised	(37,767	)	13.41
Forfeited	(20,700	)	20.33
Outstanding, July 4, 2015	859,664		$	21.42	6.6 years	$	7,462
Exercisable, July 4, 2015	406,284		$	16.41	4.2 years	$	5,562