Share-Based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2014

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

Employee service share based compensation allocation of recognized period

The following table presents share-based compensation expense attributable to stock options and restricted shares.

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2014		2013		2014		2013
	(In thousands)
Stock options	$	386	$	151	$	777	$	255
Restricted shares	489		497		1,070		927
Total share-based compensation expense	$	875	$	648	$	1,847	$	1,182

The following table presents share-based compensation expense as included in the Consolidated Statements of Income:

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2014		2013		2014		2013
	(In thousands)
Selling, general and administrative	$	764	$	565	1,613		1,030
Research and development	111		83		234		152
Total share-based compensation expense	$	875	$	648	$	1,847	$	1,182

Summary of all common stock option activity

The following table summarizes our stock option activity for the six months ended June 30, 2014:

	Number of Shares (In thousands)		Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (In thousands)
Outstanding at December 31, 2013	4,873		$	6.52
Granted	260		7.64
Exercised	(747	)	6.46
Forfeited or expired	(340	)	12.30
Outstanding at June 30, 2014	4,046		$	6.12	6.58	$	20,566
Fully vested at June 30, 2014 and expected to vest thereafter	4,015		$	6.13	6.56	$	20,373
Exercisable at June 30, 2014	1,955		$	7.55	3.84	$	7,197

Assumptions used in valuing the weighted average fair values of the options granted

The following assumptions were used to calculate the weighted average fair values of the options granted:

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2014			2013			2014			2013
Expected life (in years)	6.0			6.2			6.1			6.2
Risk-free interest rate	2.0		%	1.0		%	2.0		%	1.0		%
Volatility	57		%	60		%	58		%	60		%
Dividend yield	—			—			—			—
Weighted average grant date fair value per option granted	$	5.01		$	2.53		$	4.20		$	2.53

Restricted share activity

The following table summarizes our restricted share activity for the six months ended June 30, 2014:

	Number of Shares (In thousands)		Weighted Average Grant-Date Fair Value (Per share)
Nonvested at December 31, 2013	1,172		$	4.83
Awards granted	—		—
Awards vested	(294	)	5.09
Awards forfeited	(11	)	4.84
Nonvested at June 30, 2014	867		$	4.74