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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Fair Value of Option Grants | The fair value of option grants are estimated on the grant date using the Black-Scholes option-pricing model with the following weighted-average assumptions for option grants during the periods indicated below.
|  | Year Ended December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Expected volatility |  |  | 46.04 | % |  |  | 47.15 | % |  |  | 42.68 | %
Expected dividends |  |  | 0.00 | % |  |  | 0.00 | % |  |  | 0.00 | %
Expected term (in years) |  |  | 5.80 |  |  |  | 6.15 |  |  |  | 6.21 |
Risk-free rate |  |  | 1.32 | % |  |  | 1.62 | % |  |  | 1.94 | %
Summary of Company's Stock Option Plan Activity | The following table summarizes the stock option activity for the year ended December 31, 2016:
In thousands, except per share amounts |  | Number of Shares |  |  | Weighted-Average Exercise Price Per Share |  |  | Weighted-Average Remaining Contractual Life (Years) |  |  | Aggregate Intrinsic Value |
Options outstanding at January 1, 2016 |  |  | 1,044 |  |  | $ | 13.36 |  |  |  |  |  |  |  |  |
Granted |  |  | 329 |  |  |  | 17.49 |  |  |  |  |  |  |  |  |
Exercised |  |  | (203 | ) |  |  | 12.52 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (4 | ) |  |  | 15.66 |  |  |  |  |  |  |  |  |
Expired |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Options outstanding at December 31, 2016 |  |  | 1,166 |  |  | $ | 14.66 |  |  |  | 6.3 |  |  | $ | 13,754 |
Options exercisable at December 31, 2016 |  |  | 683 |  |  | $ | 13.09 |  |  |  | 4.9 |  |  | $ | 9,127 |
Available for grant at December 31, 2016 |  |  | 161 |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of Additional Stock Option Information | The following table provides additional stock option information for the periods indicated:
|  | Year Ended December 31, |
In thousands, except per share amounts |  | 2016 |  |  | 2015 |  |  | 2014 |
Weighted-average grant date fair value per share |  | $ | 7.74 |  |  | $ | 7.13 |  |  | $ | 7.83 |
Intrinsic value of options exercised |  | $ | 1,397 |  |  | $ | 1,524 |  |  | $ | 584 |
Fair value of stock options that vested |  | $ | 2,131 |  |  | $ | 1,207 |  |  | $ | 1,484 |
Summary of Restricted Stock Unit Activity | The following table summarizes restricted stock unit activity during the year ended December 31, 2016:
In thousands, except per unit amounts |  | Units |  |  | Weighted-Average Grant Date Fair Value Per Unit |
Non-vested units, beginning of the year |  |  | 124 |  |  | $ | 15.55 |
Granted |  |  | 73 |  |  |  | 17.02 |
Vested |  |  | — |  |  |  | — |
Forfeited |  |  | (33 | ) |  |  | 16.22 |
Non-vested units, at December 31, 2016 |  |  | 164 |  |  | $ | 16.07 |
Summary of Additional Restricted Stock Unit Information | The following table provides additional restricted stock unit information for the periods indicated:
|  | Year Ended December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Weighted-average grant date fair value per unit |  | $ | 17.02 |  |  | $ | 14.89 |  |  | $ | 17.76 |
Summary of Cash-Settled Performance Units Activity | The following table summarizes cash-settled performance unit activity during the year ended December 31, 2016:
In thousands, except per unit amounts |  | Units |  |  | Weighted-Average Grant Date Fair Value Per Unit |
Non-vested units, beginning of the year |  |  | 1,923 |  |  | $ | 1.00 |
Granted |  |  | 1,252 |  |  |  | 1.00 |
Vested |  |  | — |  |  |  | — |
Forfeited |  |  | (534 | ) |  |  | 1.00 |
Non-vested units, at December 31, 2016 |  |  | 2,641 |  |  | $ | 1.00 |
Summary of Restricted Stock Activity | The following table summarizes restricted stock activity during the year ended December 31, 2016:
In thousands, except per share amounts |  | Shares |  |  | Weighted-Average Grant Date Fair Value Per Share |
Non-vested shares, beginning of the year |  |  | 23 |  |  | $ | 16.74 |
Granted |  |  | 37 |  |  |  | 16.37 |
Vested |  |  | (21 | ) |  |  | 16.62 |
Forfeited |  |  | — |  |  |  | — |
Non-vested shares, at December 31, 2016 |  |  | 39 |  |  | $ | 16.46 |
Summary of Additional Restricted Stock Information | The following table provides additional restricted stock information.
|  | Year Ended December 31, |
In thousands, except per share amounts |  | 2016 |  |  | 2015 |  |  | 2014 |
Weighted-average grant date fair value per share |  | $ | 16.37 |  |  | $ | 15.36 |  |  | $ | 16.23 |
Fair value of restricted stock awards that vested |  | $ | 347 |  |  | $ | 2,198 |  |  | $ | 224 |

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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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