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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2021
Share-based Payment Arrangement [Abstract] |
Schedule of Stock-Based Compensation Expense | Stock-based compensation expense consisted of the following:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
(in thousands) |  | 2021 |  | 2020 |  | 2021 |  | 2020
Stock options |  | $ | 1,861 |  |  | $ | 1,755 |  |  | $ | 3,771 |  |  | $ | 3,459 |
Restricted stock units |  | 3,088 |  |  | 2,282 |  |  | 6,052 |  |  | 4,253 |
Total |  | $ | 4,949 |  |  | $ | 4,037 |  |  | $ | 9,823 |  |  | $ | 7,712 |

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