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Weighted Average Shares | 12 Months Ended
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Dec. 31, 2022
Earnings Per Share [Abstract] |
Weighted Average Shares | Weighted Average Shares Weighted-average shares were calculated as follows (in thousands):
| Year Ended December 31,
| 2022 |  | 2021 |  | 2020
Basic weighted-average common shares outstanding | 173,407 |  |  | 176,463 |  |  | 173,489 |
Effect of dilutive stock awards | 1,462 |  |  | 3,453 |  |  | 3,103 |
Diluted weighted-average common and common-equivalent shares outstanding | 174,869 |  |  | 179,916 |  |  | 176,592 |
Stock options to purchase 4,715,104, 497,504, and 4,371,194 shares of common stock, on a weighted-average basis, were outstanding in 2022, 2021, and 2020, respectively, but were not included in the calculation of dilutive net income per share because they were anti-dilutive. Restricted stock units totaling 26,079, 605, and 3,826 shares of common stock, on a weighted-average basis, were outstanding in 2022, 2021, and 2020, respectively, but were not included in the calculation of dilutive net income per share because they were anti-dilutive. No PRSUs were excluded in the calculation of dilutive net income per share in 2022, 2021, and 2020 as PRSUs were not anti-dilutive on a weighted-average basis.

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