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Net Income Per Common Share
 9 Months Ended
Sep. 30, 2025
Earnings Per Share [Abstract]  
Net Income Per Common Share Net Income Per Common Share
Basic net income per common share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income per common share is computed by dividing net income by the combination of the weighted average number of common shares outstanding during the period and other potentially dilutive weighted average common shares. Other potentially dilutive weighted average common shares include the dilutive effect of restricted stock units and performance stock units for each period using the treasury stock method. Under the treasury stock method, the amount of compensation expense, if any, for future service that has not yet been recognized is assumed to be used to repurchase shares in the current period.

The following table sets forth the computation of basic and diluted net income per common share:
 Three Months Ended
September 30		Nine Months Ended
September 30
 2025202420252024
 (thousands, except per-share data)
Net income$21,769 $91,038 $124,102 $307,454 
Weighted average common shares outstanding during the period (for basic calculation)37,385 38,848 37,692 39,286 
Dilutive effect of other potential common shares124 215 136 235 
Weighted average common shares and potential common shares (for diluted calculation)37,509 39,063 37,828 39,521 
Net income per common share - Basic$0.58 $2.34 $3.29 $7.83 
Net income per common share - Diluted$0.58 $2.33 $3.28 $7.78 
The computation of the dilutive effect of other potential common shares excludes stock awards representing 0.1 million shares of common stock and an insignificant number of shares of common stock, respectively, in the three months ended September 30, 2025 and 2024, and 0.1 million shares of common stock in both the nine months ended September 30, 2025 and 2024. Under the treasury stock method, the inclusion of these stock awards would have been antidilutive.