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Quarterly Financial Data
 12 Months Ended
Dec. 31, 2018
Quarterly Financial Data [Abstract]  
Quarterly Financial Data
Quarterly Financial Data (unaudited)
 
Sales
 
Gross profit
 
Net income
 
Diluted net income per share
 
(In thousands, except per share data)
2018
 
 
 
 
 
 
 
First Quarter
$
1,297,473

 
$
323,481

 
$
55,714

 
$
0.85

Second Quarter
1,502,532

 
385,176

 
92,540

 
1.43

Third Quarter
1,651,415

 
401,270

 
95,529

 
1.50

Fourth Quarter
1,627,120

 
391,273

 
91,474

 
1.47

Year
$
6,078,540

 
$
1,501,200

 
$
335,257

 
$
5.24

 

 

 

 

2017
 
 
 
 
 
 
 
First Quarter
$
1,153,782

 
$
242,491

 
$
(2,911
)
 
$
(0.05
)
Second Quarter
1,364,920

 
350,386

 
62,041

 
0.97

Third Quarter
1,478,726

 
363,962

 
81,888

 
1.28

Fourth Quarter
1,431,049

 
367,812

 
31,474

 
0.49

Year
$
5,428,477

 
$
1,324,651

 
$
172,492

 
$
2.69