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Earnings per Common Share | 6 Months Ended
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Jun. 30, 2024
Earnings Per Share [Abstract] |
Earnings per Common Share | Earnings per Common Share Basic earnings per common share is calculated by dividing net income by the weighted average number of common shares outstanding during the period. Diluted earnings per common share adjusts basic earnings per common share for the effects of potentially dilutive common shares. Potentially dilutive common shares include the dilutive effects of shares issuable under our equity compensation plans, including stock options and share-based awards (restricted share awards, restricted stock units and performance stock units), each using the treasury stock method. For the three and six months ended June 30, 2023, we used the if-converted method for calculating the potential dilutive effect of the conversion feature of the principal amount of our 2.0% convertible senior notes due 2023 (“2023 Convertible Notes”) on earnings per common share. The conversion feature had a dilutive impact on earnings per common share for the three and six months ended June 30, 2023, as the average market price per share of our common stock for the period exceeded the conversion price of $101.38 per share. During the three and six months ended June 30, 2024, there were no 2023 Convertible Notes outstanding.
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2024 |  | 2023 |  | 2024 |  | 2023
Numerator — basic and diluted |  |  |  |  |  |  |
Net income | $ | 83,947 |  |  | $ | 62,395 |  |  | $ | 163,912 |  |  | $ | 109,942 |
Denominator |  |  |  |  |  |  |
Weighted average number of common shares outstanding — basic | 35,221 |  |  | 33,359 |  |  | 35,099 |  |  | 33,331 |
Effect of dilutive share-based awards | 513 |  |  | 550 |  |  | 531 |  |  | 562 |
Effect of dilutive stock options | 111 |  |  | 297 |  |  | 186 |  |  | 301 |
Effect of dilutive convertible notes | — |  |  | 1,444 |  |  | — |  |  | 1,372 |
Weighted average number of common shares outstanding — diluted | 35,845 |  |  | 35,650 |  |  | 35,816 |  |  | 35,566 |
Earnings per common share — basic | $ | 2.38 |  |  | $ | 1.87 |  |  | $ | 4.67 |  |  | $ | 3.30 |
Earnings per common share — diluted | $ | 2.34 |  |  | $ | 1.75 |  |  | $ | 4.58 |  |  | $ | 3.09 |
Antidilutive stock options and share-based awards | 40 |  |  | 3 |  |  | 32 |  |  | 6 |

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