Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation Expense Related to Stock Options, Restricted Stock Units (RSUs) and Restricted Stock

The following table summarizes the stock-based compensation expense related to stock options, restricted stock units (RSUs) and restricted stock for the three and nine months ended September 30, 2013 and 2012, which was recognized as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(In thousands)	2013			2012			2013			2012
Stock-based compensation expense included in cost of sales	$	118		$	106		$	334		$	304
Selling, general and administrative expense		1,024			1,107			3,129			3,205
Research and development expense		1,034			1,138			3,053			3,274
Stock-based compensation expense included in operating expenses		2,058			2,245			6,182			6,479
Total stock-based compensation expense		2,176			2,351			6,516			6,783
Tax benefit for expense associated with non-qualified options		(307	)		(313	)		(924	)		(916	)
Total stock-based compensation expense, net of tax	$	1,869		$	2,038		$	5,592		$	5,867

Summary of Weighted-Average Assumptions and Value of Options Granted

The weighted-average assumptions and value of options granted for the three and nine months ended September 30, 2012 are summarized as follows:

	Three Months Ended			Nine Months Ended
	September 30,			September 30,
	2012			2012
Expected volatility		40.20	%		40.20	%
Risk-free interest rate		0.63	%		0.63	%
Expected dividend yield		1.30	%		1.30	%
Expected life (in years)		4.95			4.95
Weighted-average estimated value	$	8.69		$	8.69

Summary of Stock Options Outstanding

The following table is a summary of our stock options outstanding as of December 31, 2012 and September 30, 2013 and the changes that occurred during the nine months ended September 30, 2013:

(In thousands, except per share amounts)	Number of Options			Weighted Avg. Exercise Price		Weighted Avg. Remaining Contractual Life In Years		Aggregate Intrinsic Value
Options outstanding, December 31, 2012		6,035		$	24.81		6.69	$	5,154
Options granted		—		$	—
Options cancelled/forfeited		(188	)	$	26.23
Options exercised		(123	)	$	18.93
Options outstanding, September 30, 2013		5,724		$	24.89		5.96	$	21,878
Options exercisable, September 30, 2013		3,618		$	25.33		4.68	$	11,955

Summary of RSUs and Restricted Stock Outstanding

The following table is a summary of our RSUs and restricted stock outstanding as of December 31, 2012 and September 30, 2013 and the changes that occurred during the nine months ended September 30, 2013:

(In thousands, except per share amounts)	Number of Shares		Weighted Average Grant Date Fair Value
Unvested RSUs and restricted stock outstanding, December 31, 2012		103	$	29.25
RSUs and restricted stock granted		—	$	—
RSUs and restricted stock vested		—	$	—
RSUs and restricted stock cancelled/forfeited		—	$	—
Unvested RSUs and restricted stock, September 30, 2013		103	$	29.25