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Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2021
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following includes the computation of the denominator for basic and diluted weighted-average shares outstanding for the three and nine months ended September 30, 2021 and 2020:
Three Months Ended September 30,Nine Months Ended September 30,
(in thousands)2021202020212020
Weighted Average Common Shares Outstanding – Basic41,504 40,914 41,487 40,548 
Effect of Dilutive Securities:
Stock Performance Awards262 98 209 107 
Stock Awards88 49 82 53 
Employee Stock Purchase Plan Shares and Other15 17 17 25 
Dilutive Effect of Potential Common Shares365 164 308 185 
Weighted Average Common Shares Outstanding – Diluted41,869 41,078 41,795 40,733