Employee Stock Purchase Plan Stock Options and Warrants (Tables)

12 Months Ended

Dec. 31, 2012

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

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The stock-based compensation expense before income tax expense for the years ended December 31, 2012, 2011 and 2010, consisted of the following (in thousands):

	2012		2011		2010
Cost of goods sold	$	245	$	241	$	201
Research and development	119		86		56
Selling, general, and administrative	1,553		1,317		1,037
Stock-based compensation expense before taxes	$	1,917	$	1,644	$	1,294

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

In applying the Black-Scholes methodology to the option grants, the fair value of our stock-based awards granted were estimated using the following assumptions for the periods indicated below:

	2012				2011				2010
Risk-free interest rate	0.54	%	-	0.95%	0.68	%	-	1.34%	2.24%
Expected option life	4.2		-	6.0 years	4.2		-	6.0 years	6.0 years
Expected dividend yield	—%				—%				—%
Expected price volatility	42.01	%	-	44.56%	42.11	%	-	45.29%	41.4%

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable

The table below presents information related to stock option activity for the years ended December 31, 2012, 2011 and 2010 (in thousands):

	2012		2011		2010
Total intrinsic value of stock options exercised	$	3,472	$	9,433	$	1,928
Cash received from stock option exercises	3,325		7,197		1,330
Net income tax benefit from the exercises of stock options	877		3,122		399

Schedule of Share-based Compensation, Stock Options, Activity

Changes in stock options for the year ended December 31, 2012, consisted of the following (shares and intrinsic value in thousands):

	Number of Shares		Weighted Average Exercise Price		Remaining Contractual Term (in years)	Intrinsic Value
2012:
Beginning balance	4,077		$	11.96
Granted	128		13.04
Exercised	(610	)	8.51
Forfeited/expired	(60	)	14.82
Outstanding at December 31	3,535		12.55		3.0	$	6,161
Exercisable	2,521		12.55		3.0	6,156
Ending vested and expected to vest	3,521		12.21		2.2	5,635

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range

The following table summarizes information about stock options outstanding at December 31, 2012 (shares in thousands):

				Options Outstanding				Options Exercisable
Range of Exercise				Number Outstanding	Weighted Average Remaining Contractual Life (in years)	Weighted Average Exercise Price		Number Exercisable	Weighted Average Exercise Price
$	7.79	-	$11.05	932	1.74	$	9.83	932	$	9.83
$	11.41	-	$12.02	922	2.24	11.69		812	11.71
$	12.10	-	$13.75	1,042	5.59	13.59		206	13.63
$	13.82	-	$17.34	639	1.90	16.05		571	16.30
$	7.79	-	$17.34	3,535				2,521