XML 37 R26.htm IDEA: XBRL DOCUMENT v3.8.0.1
Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Computation of basic and diluted earnings per share
 
For the Three Months Ended 
 March 31,
 
2018
 
2017
Numerator (basic and diluted):
 
 
 
Net income
$
304,906

 
$
264,934

 
 
 
 
Denominator:
 
 
 
Weighted-average common shares outstanding – basic
83,530

 
92,001

Effect of stock options (1)
993

 
1,494

Weighted-average common shares outstanding – assuming dilution
84,523

 
93,495

 
 
 
 
Earnings per share:
 
 
 
Earnings per share-basic
$
3.65

 
$
2.88

Earnings per share-assuming dilution
$
3.61

 
$
2.83

 
 
 
 
Antidilutive potential common shares not included in the calculation of diluted earnings per share:
 
 
 
Stock options (1)
761

 
478

Weighted-average exercise price per share of antidilutive stock options (1)
$
259.28

 
$
266.71


(1) 
See Note 7 for further information concerning the terms of the Company’s share-based compensation plans.