Stock-Based Compensation (Tables)

9 Months Ended

Oct. 03, 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				Nine Months Ended
	October 3, 2015		September 27, 2014		October 3, 2015		September 27, 2014
Compensation expense, all share-based payment plans	$	695	$	497	$	1,750	$	1,389

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

The following table summarizes our SSARs as of October 3, 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	(90,684	)	3.72
Unvested, October 3, 2015	346,137		$	4.62	2.9 years	$	1,269	$	10,419
Employee SSARs	337,138		$	4.67	2.9 years	$	1,254	$	10,148
Nonemployee Director SSARs	8,999		$	2.23	1.1 years	$	15	$	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 October 3, 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	(14,754	)	17.52
Unvested, October 3, 2015	145,107		$	23.83	2.7 years	$	2,097	$	4,368

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.

	Nine Months Ended
	October 3, 2015		September 27, 2014
Volatility rate	10.9	%	11.2	%
Risk-free interest rate	2.1	%	2.6	%
Expected dividend yield	.7	%	1.1	%
Expected life of awards (years)	9.3		9.4

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

The following table summarizes activity under the stock option plans for the nine months endedOctober 3, 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	(46,706	)	13.51
Forfeited	(34,700	)	24.27
Outstanding, October 3, 2015	836,725		$	21.36	6.4 years	$	7,313
Exercisable, October 3, 2015	397,345		$	16.46	4.0 years	$	5,420