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Stock-Based Compensation (Tables) | 3 Months Ended
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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 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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