XML 48 R34.htm IDEA: XBRL DOCUMENT v3.8.0.1
Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Computation of basic and diluted earnings per share
 
For the Year Ended 
 December 31,
 
2017
 
2016
 
2015
Numerator (basic and diluted):
 
 
 
 
 
Net income
$
1,133,804

 
$
1,037,691

 
$
931,216

 
 
 
 
 
 
Denominator:
 
 
 
 
 
Weighted-average common shares outstanding – basic
88,426

 
95,447

 
99,965

Effect of stock options (1)
1,076

 
1,273

 
1,549

Weighted-average common shares outstanding – assuming dilution
89,502

 
96,720

 
101,514

 
 
 
 
 
 
Earnings per share:
 
 
 
 
 
Earnings per share-basic
$
12.82

 
$
10.87

 
$
9.32

Earnings per share-assuming dilution
$
12.67

 
$
10.73

 
$
9.17

 
 
 
 
 
 
Antidilutive potential common shares not included in the calculation of diluted earnings per share:
 
 
 
 
 
Stock options (1)
715

 
332

 
245

Weighted-average exercise price per share of antidilutive stock options (1)
$
252.16

 
$
265.77

 
$
216.29


(1) 
See Note 9 for further information concerning the terms of the Company’s share-based compensation plans.