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Quarterly Financial Information (Unaudited)
 12 Months Ended
Dec. 31, 2015
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, 2015 and 2014 (in thousands, except per share data):
 
 
First
 
Second
 
Third
 
Fourth
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
Net Sales
$
368,937

 
$
335,739

 
$
379,258

 
$
338,437

 
$
389,829

 
$
350,914

 
$
405,593

 
$
350,411

Gross Profit
143,092

 
131,299

 
145,543

 
134,292

 
151,897

 
138,626

 
163,244

 
134,673

Operating Income
107,709

 
97,178

 
108,133

 
99,835

 
116,263

 
103,206

 
126,662

 
98,615

Net Income
77,183

 
68,566

 
74,558

 
76,727

 
78,332

 
72,337

 
88,396

 
70,975

Earnings Per Share (Diluted)
$
0.26

 
$
0.24

 
$
0.25

 
$
0.26

 
$
0.27

 
$
0.25

 
$
0.30

 
$
0.24

Earnings Per Share (Basic)
$
0.26

 
$
0.24

 
$
0.25

 
$
0.27

 
$
0.27

 
$
0.25

 
$
0.30

 
$
0.24