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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2020
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 years ended December 31, 2020, 2019 and 2018:
(in thousands)202020192018
Weighted Average Common Shares Outstanding – Basic40,710 39,721 39,600 
Effect of Dilutive Securities:
Stock Performance Awards116 147 212 
Restricted Stock Awards63 81 78 
Employee Stock Purchase Plan Shares and Other16 
Dilutive Effect of Potential Common Shares195 233 292 
Weighted Average Common Shares Outstanding – Diluted40,905 39,954 39,892