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Stock-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Company's stock-based compensation activity | The following table summarizes the Company’s stock option activity for the year ended December 31, 2018:
| Shares (in thousands) |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Life |  | Aggregate Intrinsic Value* (in thousands)
Non-Qualified Stock Options |  |  |
Outstanding at January 1, 2018 | 28 |  |  | $ | 29.66 |  |  | 0.1 |  |  | $ | 780 |
Exercised | (23 | ) |  | $ | 29.66 |  |  |  |  |  |  |
Forfeited | (5 | ) |  | $ | 29.66 |  |  |  |  |
Outstanding and exercisable at December 31, 2018 | — |  |  | $ | — |  |  | — |  |  | $ | — |
The following table shows the Company’s stock-based compensation activity:
| Fiscal Years Ended December 31,
(in thousands) | 2018 |  | 2017 |  | 2016
Stock-based compensation expense recognized in operating expenses | $ | 10,356 |  |  | $ | 12,744 |  |  | $ | 13,113 |
Tax benefit of stock-based compensation expense in provision for income taxes | 2,476 |  |  | 4,575 |  |  | 4,757 |
Stock-based compensation expense, net of tax | $ | 7,880 |  |  | $ | 8,169 |  |  | $ | 8,356 |
Fair value of shares vested | $ | 15,372 |  |  | $ | 11,043 |  |  | $ | 13,186 |
Proceeds to the Company from the exercise of stock-based compensation | $ | 695 |  |  | $ | 6,610 |  |  | $ | 7,976 |
Tax benefit from exercise of stock-based compensation, including shortfall tax benefits | $ | — |  |  | $ | — |  |  | $ | (251 | )
Schedule of unvested restricted stock unit activity | following table summarizes the Company’s unvested restricted stock unit activity for the year ended December 31, 2018:
| Shares (in thousands) |  | Weighted- Average Price |  | Aggregate Intrinsic Value * (in thousands)
Unvested Restricted Stock Units (RSUs) |  |
Outstanding at January 1, 2018 | 696 |  |  | $ | 35.34 |  |  | $ | 39,609 |
Awarded | 189 |  |  | 54.99 |  |  |  |
Vested | (263 | ) |  | 35.23 |  |  |  |
Forfeited | (18 | ) |  | 39.23 |  |  |  |
Outstanding at December 31, 2018 | 604 |  |  | $ | 41.37 |  |  | $ | 32,669 |
Outstanding and expected to vest at December 31, 2018 | 598 |  |  | $ | 41.32 |  |  | $ | 32,388 |
* The intrinsic value for outstanding and expected to vest is calculated using the closing price per share of $54.13, as reported by the New York Stock Exchange on December 31, 2018.

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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