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Earnings Per Share
 6 Months Ended
Jun. 30, 2023
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share
The numerator used in the calculation of both basic and diluted earnings per common share is net income. The denominator used in the calculation of basic earnings per common share is the weighted-average number of common shares outstanding during the period. The denominator used in the calculation of diluted earnings per common share is derived by adjusting basic shares outstanding for the dilutive effect of potential common shares outstanding, which consist of time and performance-based stock awards and employee stock purchase plan shares.
The following includes the computation of the denominator for basic and diluted weighted-average shares outstanding for the three and six months ended June 30, 2023 and 2022:
Three Months Ended June 30,Six Months Ended June 30,
(in thousands)2023202220232022
Weighted-Average Common Shares Outstanding – Basic41,678 41,597 41,655 41,573 
Effect of Dilutive Securities:
Stock Performance Awards281 259 281 239 
Restricted Stock Awards92 85 97 94 
Employee Stock Purchase Plan Shares and Other2 3 2 1 
Dilutive Effect of Potential Common Shares375 347 380 334 
Weighted-Average Common Shares Outstanding – Diluted42,053 41,944 42,035 41,907 
The number of shares excluded from diluted weighted-average common shares outstanding because such shares were anti-dilutive was not material for the three and six months ended June 30, 2023 and 2022.