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Net Income Per Share | 12 Months Ended
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Dec. 31, 2024
Earnings Per Share [Abstract] |
Net Income Per Share | 3. Net Inco me 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) |  | 2024 |  |  | 2023 |  |  | 2022 |
Net income—basic and diluted |  | $ | 604,440 |  |  | $ | 603,119 |  |  | $ | 742,934 |
Average common shares outstanding—basic |  |  | 152,465 |  |  |  | 158,140 |  |  |  | 167,930 |
Dilutive effect of share-based compensation arrangements (1) |  |  | 1,726 |  |  |  | 1,993 |  |  |  | 2,734 |
Adjusted average common shares outstanding—diluted |  |  | 154,191 |  |  |  | 160,133 |  |  |  | 170,664 |
Net income per share |  |  |  |  |  |  |  |  |
Basic |  | $ | 3.96 |  |  | $ | 3.81 |  |  | $ | 4.42 |
Diluted |  | $ | 3.92 |  |  | $ | 3.77 |  |  | $ | 4.35 |
(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 their effect would be anti-dilutive.
|  | Years Ended December 31, |
(In thousands) |  | 2024 |  |  | 2023 |  |  | 2022 |
Shares of common stock equivalents |  |  | 11 |  |  |  | 14 |  |  |  | — |

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