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STOCK AWARD PLANS (Tables) | 9 Months Ended
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Sep. 30, 2021
Share-based Payment Arrangement [Abstract] |
Schedule of Stock-based Compensation | A summary of our total compensation expense recognized in our condensed consolidated statements of operations and comprehensive income for stock-based compensation is as follows (in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Stock options | $ | 4,070 |  |  | $ | 5,081 |  |  | $ | 12,064 |  |  | $ | 15,119 |
Stock awards | 36,012 |  |  | 5,042 |  |  | 79,361 |  |  | 15,736 |
Company expense on ESPP discount | 730 |  |  | 653 |  |  | 2,537 |  |  | 2,272 |
Total stock-based compensation expense | $ | 40,812 |  |  | $ | 10,776 |  |  | $ | 93,962 |  |  | $ | 33,127 |
Schedule Employee Stock Purchase Plan Activity | The following is a summary of the employee stock purchase plan activity (dollars in thousands):
Three Months Ended September 30, 2021
Shares purchased by employees |  | Aggregate cost to employees |  | Expense recognized by the company
55,904 |  |  | $ | 4,134 |  |  | $ | 730 |

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