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Net Income Per Share | 12 Months Ended
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Dec. 31, 2022
Earnings Per Share [Abstract] |
Net Income Per Share | Net Income Per Share The calculation of basic and diluted net income per share is as follows.
Net income per share |  |  |  |  |  |
|  | Years Ended December 31,
(In thousands, except per-share amounts) |  | 2022 |  | 2021 |  | 2020
Net income—basic and diluted |  | $ | 742,934 |  |  | $ | 600,671 |  |  | $ | 393,626 |
Average common shares outstanding—basic |  | 167,930 |  |  | 188,370 |  |  | 195,443 |
Dilutive effect of stock-based compensation arrangements (1) |  | 2,734 |  |  | 1,893 |  |  | 1,199 |
Adjusted average common shares outstanding—diluted |  | 170,664 |  |  | 190,263 |  |  | 196,642 |
Net income per share |  |  |  |  |  |
Basic |  | $ | 4.42 |  |  | $ | 3.19 |  |  | $ | 2.01 |
Diluted |  | $ | 4.35 |  |  | $ | 3.16 |  |  | $ | 2.00 |
(1)The following number of shares of our common stock equivalents issued under our share-based compensation arrangements are not included in the calculation of diluted net income per share because they are anti-dilutive.
|  | Years Ended December 31,
(In thousands) |  | 2022 |  | 2021 |  | 2020
Shares of common stock equivalents |  | — |  |  | 28 |  |  | 865 |

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