Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

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

The following table summarizes the stock-based compensation expense related to stock options, performance stock units (PSUs), restricted stock units (RSUs) and restricted stock for the three months ended March 31, 2017 and 2016, which was recognized as follows:

	Three Months Ended
	March 31,
(In thousands)	2017			2016
Stock-based compensation expense included in cost of sales	$	91		$	99
Selling, general and administrative expense		1,016			769
Research and development expense		776			690
Stock-based compensation expense included in operating expenses		1,792			1,459
Total stock-based compensation expense		1,883			1,558
Tax benefit for expense associated with non-qualified options		(380	)		(212	)
Total stock-based compensation expense, net of tax	$	1,503		$	1,346

Summary of Stock Options Outstanding

The following table is a summary of our stock options outstanding as of December 31, 2016 and March 31, 2017 and the changes that occurred during the three months ended March 31, 2017:

(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, 2016		6,338		$	22.14		5.63	$	16,972
Options granted		—		$	—
Options exercised		(82	)	$	16.84
Options forfeited		(12	)	$	17.84
Options expired		(16	)	$	26.18
Options outstanding, March 31, 2017		6,228		$	22.21		5.38	$	11,692
Options vested and expected to vest, March 31, 2017		6,228		$	22.21		5.38	$	11,692
Options exercisable, March 31, 2017		4,660		$	23.78		4.47	$	6,111

Summary of PSUs, RSUs and Restricted Stock Outstanding

The following table is a summary of our PSUs, RSUs and restricted stock outstanding as of December 31, 2016 and the changes that occurred during the three months ended March 31, 2017:

(In thousands, except per share amounts)	Number of Shares			Weighted Avg. Grant Date Fair Value
Unvested PSUs, RSUs and restricted stock outstanding, December 31, 2016		519		$	20.51
PSUs, RSUs and restricted stock granted		518		$	22.25
PSUs, RSUs and restricted stock vested		(2	)	$	18.29
PSUs, RSUs and restricted stock forfeited		(2	)	$	20.00
Unvested PSUs, RSUs and restricted stock outstanding, March 31, 2017		1,033		$	21.39