Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

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

Schedule of Stock-based Compensation Expense

Stock-based compensation expense by income statement caption and the related income tax benefit were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2013		2012		2013		2012
Research and development	$	54	$	52	$	166	$	167
Selling, general and administrative:
Employees	1,120		949		3,378		2,761
Outside directors	215		109		406		519
Total stock-based compensation expense	$	1,389	$	1,110	$	3,950	$	3,447
Income tax benefit	$	451	$	358	$	1,255	$	1,125

Schedule of Stock Option Activity

Stock option activity was as follows:

	Number of Options (in 000's)		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Terms (in years)	Aggregate Intrinsic Value (in 000's)
Outstanding at December 31, 2012	1,412		$	20.56
Granted	201		19.68
Exercised	(499	)	17.00			$	5,564
Forfeited/canceled/expired	(7	)	28.08
Outstanding at September 30, 2013 (1)	1,107		$	21.96	5.95	$	15,584
Vested and expected to vest at September 30, 2013 (1)	1,103		$	21.96	5.94	$	15,519
Exercisable on September 30, 2013 (1)	811		$	22.39	4.93	$	11,068

⁽¹⁾  The aggregate intrinsic value represents the total pre-tax value (the difference between our closing stock price on the last trading day of the third quarter of 2013 and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had they all exercised their options on September 30, 2013. This amount will change based on the fair market value of our stock.

Schedule of Black Scholes Assumptions

The assumptions we utilized in the Black-Scholes option pricing model and the resulting weighted average fair value of stock option grants were the following:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Weighted average fair value of grants (1)	$	—		$	7.17		$	9.26		$	9.57
Risk-free interest rate	—		%	0.72		%	0.95		%	0.86		%
Expected volatility	—		%	54.44		%	53.39		%	55.22		%
Expected life in years	0.00			5.34			5.20			5.15

⁽¹⁾  The weighted average fair value of grants was calculated utilizing the stock options granted during each respective period.

Schedule of Non-vested Restricted Stock Awards Activity

Non-vested restricted stock award activity was as follows:

	Shares Granted (in 000’s)		Weighted-Average Grant Date Fair Value
Non-vested at December 31, 2012	270		$	18.72
Granted	110		21.84
Vested	(143	)	19.52
Forfeited	—		—
Non-vested at September 30, 2013	237		$	19.67