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Quarterly Financial Information (Unaudited)
 12 Months Ended
Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Financial Information (Unaudited)
QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

The following table sets forth selected financial information for all of the quarters during the years ended December 31, 2016 and 2015 (in thousands, except per share data):
 
 
First
 
Second
 
Third
 
Fourth
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
Net Sales
$
405,568

 
$
368,937

 
$
423,801

 
$
379,258

 
$
429,643

 
$
389,829

 
$
419,913

 
$
405,593

Gross Profit
158,691

 
143,092

 
166,773

 
145,543

 
173,822

 
151,897

 
169,167

 
163,244

Operating Income
120,849

 
107,709

 
128,746

 
108,133

 
134,212

 
116,263

 
127,936

 
126,662

Net Income
80,280

 
77,183

 
86,485

 
74,558

 
92,065

 
78,332

 
88,761

 
88,396

Earnings Per Share (Diluted)
$
0.28

 
$
0.26

 
$
0.30

 
$
0.25

 
$
0.32

 
$
0.27

 
$
0.31

 
$
0.30

Earnings Per Share (Basic)
$
0.28

 
$
0.26

 
$
0.30

 
$
0.25

 
$
0.32

 
$
0.27

 
$
0.31

 
$
0.30