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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2021
Earnings Per Share [Abstract]  
Schedule of Basic and Diluted Net Income Per Share
Reconciliation of the shares used in the basic and diluted earnings per share computations for the three months ended March 31, 2021 and 2020 are as follows (in thousands):
Three Months Ended March 31,
20212020
Basic weighted average shares outstanding48,736 48,485 
Add effects of share-based compensation instruments (1)
— 284 
Diluted weighted average shares outstanding48,736 48,769 
(1)Excluded from the computation of diluted earnings per share were stock options, SARs and restricted share units totaling 4.3 million and 1.5 million for the three months ended March 31, 2021 and 2020, respectively, because to include them would have been anti-dilutive under the treasury stock method.