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Earnings Per Share
 12 Months Ended
Dec. 31, 2023
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share
The numerator used in the calculation of both basic and diluted earnings per share is net income. The denominator used in the calculation of basic earnings per share is the weighted-average number of shares outstanding during the period. The denominator used in the calculation of diluted earnings per share is derived by adjusting basic shares outstanding for the dilutive effect of potential shares outstanding, which consist of shares associated with time and performance based stock awards and our employee stock purchase plan.
The following includes the computation of the denominator for basic and diluted weighted-average shares outstanding for the years ended December 31, 2023, 2022 and 2021:
(in thousands)202320222021
Weighted Average Common Shares Outstanding – Basic41,668 41,586 41,491 
Effect of Dilutive Securities:
Stock Performance Awards269 248 226 
Restricted Stock Awards100 95 87 
Employee Stock Purchase Plan Shares and Other2 2 14 
Dilutive Effect of Potential Common Shares371 345 327 
Weighted Average Common Shares Outstanding – Diluted42,039 41,931 41,818 
The amount of shares excluded from diluted weighted-average common shares outstanding because such shares were anti-dilutive was not material for the years ended December 31, 2023, 2022 and 2021.