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Equity Compensation (Tables) | 12 Months Ended
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Dec. 31, 2020
Share-based Payment Arrangement [Abstract] |
Compensation Expense Information Based on Fair Value of Stock Options and RSUs | The following table provides compensation expense information based on the fair value of stock options and RSU's for the years ended December 31 as follows:
(In thousands) | 2020 |  | 2019 |  | 2018
Equity-based Compensation Expense | $ | 5,184 |  |  | $ | 3,843 |  |  | $ | 3,098 |
Tax Benefit | (709) |  |  | (452) |  |  | (179) |
Equity-based Compensation Expense, Net of Tax | $ | 4,475 |  |  | $ | 3,391 |  |  | $ | 2,919 |
Summary of Weighted Average Fair Value of Options Granted |
| 2020 |  | 2019 |  | 2018
Weighted Average Fair Value of the Options Granted | $ | — |  |  | $ | 11.93 |  |  | $ | 14.64 |
Summary of Weighted-Average Assumptions | The weighted average fair value for these options was estimated at the date of grant using a Black-Scholes option pricing model with the following weighted-average assumptions:
| 2020 |  | 2019 |  | 2018
Risk-free Interest Rate | — |  | 1.67% – 1.78% |  | 2.63% – 2.87%
Dividend Yield | —% |  | —% |  | —%
Volatility Factor | — |  | 0.39 |  | 0.39
Expected Life in Years | — |  | 5.0 – 7.0 |  | 5.0 – 8.0 years
Summary of Company's Stock Option Activity and Related Information | A summary of the Company’s stock option activity and related information for the years ended December 31 is as follows:
| 2020
(Aggregate intrinsic value in thousands) | Options |  | Weighted Average Exercise Price |  | Aggregate Intrinsic Value
Outstanding at January 1 | 1,116,045 |  |  | $ | 23.07 |  |  | $ | — |
Options Granted | — |  |  | $ | — |  |  |
Options Exercised | (169,763) |  |  | $ | 7.88 |  |  |
Options Forfeited | (33,359) |  |  | $ | 34.05 |  |  |
Outstanding at December 31 | 912,923 |  |  | $ | 25.50 |  |  | $ | — |
Exercisable at December 31 | 697,501 |  |  | $ | 23.64 |  |  | $ | — |
Summary of Weighted Average Exercise Prices and Contractual Lives for Outstanding and Exercisable Stock Options | The following is a summary of weighted average exercise prices and contractual lives for outstanding and exercisable stock options as of December 31, 2020:
| Outstanding |  | Exercisable
Exercise Price Range | Shares |  | Weighted Average Remaining Life in Years |  | Weighted Average Exercise Price |  | Shares |  | Weighted Average Remaining Life in Years |  | Weighted Average Exercise Price
$3.19 – $13.63 | 255,500 |  |  | 1.5 |  | $ | 10.98 |  |  | 255,500 |  |  | 1.5 |  | $ | 10.98 |
$22.69 – $35.82 | 648,296 |  |  | 6.4 |  | $ | 30.93 |  |  | 432,874 |  |  | 5.5 |  | $ | 30.65 |
$45.89 – $45.89 | 9,127 |  |  | 4.2 |  | $ | 45.89 |  |  | 9,127 |  |  | 4.2 |  | $ | 45.89 |
| 912,923 |  |  | 5.0 |  | $ | 25.50 |  |  | 697,501 |  |  | 4.0 |  | $ | 23.64 |
Fair Value for Options Granted under Employee Stock Purchase Plan | The fair value for the options granted under the Employee Stock Purchase Plan was estimated at the date of grant using a Black-Scholes option pricing model with the following weighted-average assumptions:
| 2020 |  | 2019 |  | 2018
Risk-free Interest Rate | 0.12 | % |  |  | 1.73 | % |  |  | 2.60 | % |
Dividend Yield | — | % |  |  | — | % |  |  | — | % |
Volatility Factor | 1.00 |  |  | 0.53 |  |  | 0.33 |
Expected Life in Years | 1.0 |  |  | 1.0 |  |  | 1.0 |

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