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Stock-Based Compensation - Narrative (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 11, 2021 | Feb. 28, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Value of shares withheld |  |  | $ 2,805 | $ 448 | $ 864
Proceeds from stock options exercised |  |  | 2,805 | 448 | 864
Tax benefit from stock options exercised |  |  | $ 300 | $ 10 | $ 200
Options granted (in shares) |  |  | 109,000 | 170,000 | 119,000
Restricted stock granted (in shares) |  |  | 238,000 | 268,000 | 167,000
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] |  |  |  |  |
Unrecognized pre-tax stock-based compensation expense |  |  | $ 2,200 |  |
Unrecognized pre-tax stock-based compensation expense, period for recognition |  |  | 1 year 9 months 18 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 |  |  | $ 8,400 |  |
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) | 80,315 |  |  |  |
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 |  |  |  |
Certain executive employees | Stock options | Vesting on February 12, 2021 | 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) |  | 111,775 |  |  |
Grant date fair value of restricted stock |  | $ 6,700 |  |  |
Certain executive employees | Non-vested restricted stock award | Vesting on February 12, 2021 | Subsequent event |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting rights percentage | 33.33% |  |  |  |
Restricted stock granted (in shares) | 32,395 |  |  |  |
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% |  |  |  |
Certain executive employees | Non-vested restricted stock award | Share-based Payment Arrangement, Tranche Two | Subsequent event |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting rights percentage | 33.33% |  |  |  |
Restricted stock granted (in shares) | 79,380 |  |  |  |

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