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Net Income Per Common Share
 6 Months Ended
Jun. 30, 2023
Earnings Per Share [Abstract]  
Net Income Per Common Share
Note 8 - Net Income Per Common Share
The following table displays a reconciliation of the information used in calculating basic and diluted net income per common share for the three and six months ended June 30, 2023 and 2022. Diluted net income per common share incorporates the potential impact of contingently issuable shares, including awards which require future service as a condition of delivery of the underlying common stock.
Three Months Ended June 30,Six Months Ended June 30,
(in thousands, except per share data)2023202220232022
Basic Net Income Per Common Share:
Net income available to common shareholders$165,819 $169,761 $359,688 $332,507 
Weighted average common shares outstanding146,113 145,328 145,957 145,301 
Net income per common share, basic$1.13 $1.17 $2.46 $2.29 
Diluted Net Income Per Common Share:
Net income available to common shareholders$165,819 $169,761 $359,688 $332,507 
Weighted average common shares outstanding146,113 145,328 145,957 145,301 
Effect of dilutive outstanding equity-based awards437 987 687 1,188 
Weighted average diluted common shares146,550 146,315 146,644 146,489 
Net income per common share, diluted$1.13 $1.16 $2.45 $2.27 
For the three months ended June 30, 2023 and 2022, there were 273 thousand and 21 thousand, respectively, potentially dilutive shares related to stock options to purchase shares of common stock that were outstanding. For the six months ended June 30, 2023 and 2022, there were 273 thousand and 11 thousand, respectively, potentially dilutive shares related to stock options to purchase shares of common stock that were outstanding. These potentially dilutive shares were not included in the computation of diluted net income per common share because the effect would be anti-dilutive.