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Stock-Based Compensation - Narrative (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Feb. 12, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Proceeds from stock options exercised |  | $ 448,000 | $ 864,000 | $ 1,442,000
Tax benefit from stock options exercised |  | $ 10,000 | $ 200,000 | $ 700,000
Options granted (in shares) |  | 170,000 | 119,000 | 92,000
Restricted stock granted (in shares) |  | 268,000 | 167,000 | 133,000
Restricted stock vested (in shares) |  | 141,000 | 109,000 | 119,000
Term of plans / awards |  | 10 years |  |
Minimum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period |  | 1 year |  |
Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period |  | 4 years |  |
Stock Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Modification expense |  | $ 0 | $ 0 | $ 0
Unrecognized pre-tax stock-based compensation expense |  | $ 2,200,000 |  |
Unrecognized pre-tax stock-based compensation expense, period for recognition |  | 1 year 10 months 24 days |  |
Term of plans / awards |  | 10 years |  |
Stock Options | Minimum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period |  | 3 years |  |
Stock Options | Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period |  | 4 years |  |
Non-Vested Restricted Stock Award |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unrecognized pre-tax stock-based compensation expense |  | $ 7,200,000 |  |
Unrecognized pre-tax stock-based compensation expense, period for recognition |  | 1 year 8 months 12 days |  |
Non-Vested Restricted Stock Award | Minimum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period |  | 1 year |  |
Non-Vested Restricted Stock Award | Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period |  | 3 years |  |
Stock Appreciation Rights and Performance Stock Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Awards granted to date (in shares) |  | 0 |  |
Certain Executive Employees | Subsequent Event |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options granted (in shares) | 108,755 |  |  |
Certain Executive Employees | Stock Options | Subsequent Event |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period | 3 years |  |  |
Grant date fair value of stock options | $ 1,900,000 |  |  |
Certain Executive Employees | Stock Options | Vesting on February 13, 2020 | Subsequent Event |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting rights percentage | 33.33% |  |  |
Certain Executive Employees | Stock Options | Vesting Quarterly Thereafter | Subsequent Event |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting rights percentage | 8.33% |  |  |
Certain Executive Employees | Non-Vested Restricted Stock Award | Subsequent Event |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period | 3 years |  |  |
Restricted stock granted (in shares) | 41,695 |  |  |
Grant date fair value of restricted stock | $ 1,900,000 |  |  |
Certain Executive Employees | Non-Vested Restricted Stock Award | Vesting on February 13, 2020 | Subsequent Event |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting rights percentage | 33.33% |  |  |
Certain Executive Employees | Non-Vested Restricted Stock Award | Vesting Quarterly Thereafter | Subsequent Event |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting rights percentage | 8.33% |  |  |

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