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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
Reconciliation of Weighted Average Share Amounts used to Compute Both Basic and Diluted Earnings Per Share
The following table reconciles the weighted average share amounts used to compute both basic and diluted earnings per share (in thousands):
 
 
Years Ended December 31,
 
 
 
2018
 
 
2017
 
 
2016
 
Weighted average shares outstanding:
 
 
 
 
 
 
 
 
 
 
 
 
Basic weighted average shares outstanding
 
 
116,057
 
 
 
118,059
 
 
 
117,533
 
Add: Dilutive effect of stock options and RSUs
 
 
1,575
 
 
 
1,385
 
 
 
1,314
 
Diluted weighted average shares outstanding
 
 
117,632
 
 
 
119,444
 
 
 
118,847