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STOCK AWARD PLANS (Tables) | 9 Months Ended
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Sep. 30, 2020
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,
| 2020 |  | 2019 |  | 2020 |  | 2019
Stock options | $ | 5,081 |  |  | $ | 4,829 |  |  | $ | 15,119 |  |  | $ | 13,539 |
Stock awards | 5,042 |  |  | 3,470 |  |  | 15,736 |  |  | 24,798 |
Company expense on ESPP discount | 653 |  |  | 551 |  |  | 2,272 |  |  | 2,320 |
Total stock-based compensation expense | $ | 10,776 |  |  | $ | 8,850 |  |  | $ | 33,127 |  |  | $ | 40,657 |
Schedule Employee Stock Purchase Plan Activity | The following is a summary of the employee stock purchase plan activity:
Three Months Ended September 30, 2020
Shares purchased by employees |  | Aggregate cost to employees |  | Expense recognized by the company
42,445 |  |  | $ | 3,699,626 |  |  | $ | 652,875 |

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