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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Schedule of Share-Based Compensation Expense | The table below reflects the total share-based compensation expense recognized in our Consolidated Statements of Comprehensive Income for the years ended December 31, 2023, 2022 and 2021:
|  | Year Ended December 31,
Income Statement Classification |  | 2023 |  | 2022 |  | 2021
Direct cost of revenues |  | $ | 19,067 |  |  | $ | 15,312 |  |  | $ | 13,432 |
Selling, general and administrative expenses |  | 17,205 |  |  | 12,416 |  |  | 14,148 |
Total |  | $ | 36,272 |  |  | $ | 27,728 |  |  | $ | 27,580 |
Schedule of Stock Option Activity | A summary of our stock option activity during the year ended December 31, 2023 is presented below. The aggregate intrinsic value of stock options outstanding and exercisable, or fully vested, at December 31, 2023 in the table below represents the total pre-tax intrinsic value, which is calculated as the difference between the closing price of our common stock on the last trading day of 2023 and the exercise price, multiplied by the number of in-the-money options that would have been received by the option holders had all option holders exercised their options on December 31, 2023. The aggregate intrinsic value changes based on fluctuations in the fair market value per share of our common stock.
| Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (in Years) |  | Aggregate Intrinsic Value
Stock options outstanding at December 31, 2022 | 392 |  |  | $ | 36.89 |  |  |  |  |
Stock options exercised | (38) |  |  | $ | 33.91 |  |  |  |  |
Stock options outstanding and exercisable at December 31, 2023 | 354 |  |  | $ | 37.21 |  |  | 2.0 |  | $ | 57,313 |
Schedule of Unvested Restricted Share Awards Activity | A summary of our restricted share awards activity during the year ended December 31, 2023 is presented below:
| Shares |  | Weighted Average Grant Date Fair Value
Restricted share awards outstanding at December 31, 2022 | 684 |  |  | $ | 106.63 |
Restricted share awards granted | 100 |  |  | $ | 189.86 |
Restricted share awards vested | (155) |  |  | $ | 93.43 |
Restricted share awards forfeited | (9) |  |  | $ | 142.50 |
Restricted share awards outstanding at December 31, 2023 | 620 |  |  | $ | 122.88 |
Schedule of Restricted Stock Unit Activity | A summary of our restricted stock units activity during the year ended December 31, 2023 is presented below:
| Shares |  | Weighted Average Grant Date Fair Value |  |
Restricted stock units outstanding at December 31, 2022 | 328 |  |  | $ | 77.66 |  |  |
Restricted stock units granted | 105 |  |  | $ | 178.13 |  |  |
Restricted stock units released | (37) |  |  | $ | 116.72 |  |  |
Restricted stock units forfeited | (5) |  |  | $ | 137.12 |  |  |
Restricted stock units outstanding at December 31, 2023 | 391 |  |  | $ | 100.28 |  |  |
Schedule of Performance Stock Units Activity | A summary of our performance stock units activity during the year ended December 31, 2023 is presented below:
| Shares |  | Weighted Average Grant Date Fair Value |  |
Performance stock units outstanding at December 31, 2022 | 245 |  |  | $ | 143.44 |  |  |
Performance stock units granted (1) | 80 |  |  | $ | 198.21 |  |  |
Performance stock units released | (71) |  |  | $ | 136.34 |  |  |
Performance stock units forfeited (2) | (47) |  |  | $ | 146.73 |  |  |
Performance stock units outstanding at December 31, 2023 | 207 |  |  | $ | 166.22 |  |  |
(1) Performance stock units granted are presented at the maximum potential payout percentage of 150% of target shares granted. (2) Performance stock units are forfeited when the market or performance conditions for maximum payout are not achieved, including performance stock units that do not achieve any payout, or the employee is terminated prior to vesting.

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