XML 53 R39.htm IDEA: XBRL DOCUMENT v3.10.0.1
Net Income Per Share (Tables)
 12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
Calculation of Net Income Per Share
The calculation of net income per share for the three years ended December 31, 2018 is reflected in the following table (in thousands, except per share amounts):
 
 
 
Years Ended December 31,
 
 
2018
 
2017
 
2016
 
 
 
 
 
 
 
Net income
 
$
434,288

 
$
290,584

 
$
343,389

Basic:
 
 
 
 
 
 
       Weighted average shares
 
120,513

 
124,152

 
127,991

        Diluted:
 
 
 
 
 
 
        Weighted average shares
 
120,513

 
124,152

 
127,991

        Dilutive effect of potential common shares
 
1,089

 
740

 
775

        Diluted weighted average shares
 
121,602

 
124,892

 
128,766

Net income per share:
 
 
 
 
 
 
        Basic
 
$
3.60

 
$
2.34

 
$
2.68

        Diluted
 
$
3.57

 
$
2.33

 
$
2.67