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Net Income Per Common Share
 12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
NET INCOME PER COMMON SHARE
NET INCOME PER SHARE 
 
2018
 
2017
 
2016
Basic
 
 
 
 
 
     Average shares outstanding
92,992,457

 
92,908,638

 
91,838,603

     Net income
 
 
 
 
 
Continuing operations (1)
$
1,108,746

 
$
1,769,488

 
$
1,132,703

Discontinued operations


 
(41,540
)
 


Net income (1)
$
1,108,746

 
$
1,727,948

 
$
1,132,703

Basic net income per share
 
 
 
 
 
Continuing operations (1)
$
11.92

 
$
19.04

 
$
12.33

Discontinued operations


 
(.44
)
 


Net income per share (1)
$
11.92

 
$
18.60

 
$
12.33

 
 
 
 
 
 
Diluted
 
 
 
 
 
Average shares outstanding
92,992,457

 
92,908,638

 
91,838,603

Stock options and other contingently issuable shares (2)
1,938,586

 
1,931,157

 
2,089,921

Non-vested restricted stock grants
57,027

 
87,418

 
559,562

Average shares outstanding assuming dilution
94,988,070

 
94,927,213

 
94,488,086

 
 
 
 
 
 
Net income
 
 
 
 
 
Continuing operations (1)
$
1,108,746

 
$
1,769,488

 
$
1,132,703

Discontinued operations


 
(41,540
)
 


Net income (1)
$
1,108,746

 
$
1,727,948

 
$
1,132,703

 
 
 
 
 
 
Diluted net income per share
 
 
 
 
 
Continuing operations (1)
$
11.67

 
$
18.64

 
$
11.99

Discontinued operations


 
(.44
)
 


Net income per share (1)
$
11.67

 
$
18.20

 
$
11.99


(1) 
The year ended December 31, 2017 has been adjusted for an inventory accounting change. See Note 1.
(2)
Stock options and other contingently issuable shares excludes 28,321, 638,795 and 62,935 shares at December 31, 2018, 2017 and 2016, respectively, due to their anti-dilutive effect.
Basic and diluted net income per share are calculated using the treasury stock method.