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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings Per Share
The following table sets forth the computation of basic and diluted earnings per share ("EPS") for the periods presented (in thousands, except per share amounts):
 
Three Months Ended
March 31,
 
2018
 
2017
Net income
$
62,894

 
$
42,062

Weighted-average shares used to calculate basic EPS
79,241

 
72,773

Effect of dilutive securities:
 
 
 
Employee equity awards
408

 
594

Weighted-average shares used to calculate diluted EPS
79,649

 
73,367

 
 
 
 
Basic EPS
$
0.79

 
$
0.58

Diluted EPS
$
0.79

 
$
0.57