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Quarterly Data (Unaudited)
 12 Months Ended
Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Data (Unaudited)
QUARTERLY DATA (UNAUDITED)
 
 
 
1st
 
2nd
 
3rd
 
4th
 
Total Year
 
 
(dollars in thousands, except per share data) 
 
 
2016
 
 

 
 

 
 

 
 

 
 
Net sales
 
$
516,355

 
$
580,456

 
$
574,224

 
$
596,817

 
$
2,267,852

Gross profit
 
196,773

 
233,502

 
231,728

 
239,177

 
901,180

Income from operations
 
86,375

 
111,913

 
121,439

 
126,498

 
446,225

Net earnings
 
$
54,538

 
$
72,891

 
$
75,851

 
$
80,936

 
$
284,216

 
 
 
 
 
 
 
 
 
 
 
Basic earnings per share (1)
 
$
0.96

 
$
1.28

 
$
1.33

 
$
1.42

 
$
4.98

Diluted earnings per share (1)
 
$
0.96

 
$
1.28

 
$
1.33

 
$
1.41

 
$
4.98

 
 
 
 
 
 
 
 
 
 
 
2015
 
 

 
 

 
 

 
 

 
 
Net sales
 
$
406,596

 
$
436,291

 
$
449,004

 
$
534,707

 
$
1,826,598

Gross profit
 
157,562

 
172,889

 
177,182

 
198,872

 
706,505

Income from operations
 
66,580

 
83,360

 
80,030

 
72,633

 
302,603

Net earnings
 
$
38,231

 
$
54,267

 
$
48,825

 
$
50,287

 
$
191,610

 
 
 
 
 
 
 
 
 
 
 
Basic earnings per share (1)
 
$
0.67

 
$
0.95

 
$
0.86

 
$
0.88

 
$
3.36

Diluted earnings per share (1)
 
$
0.67

 
$
0.95

 
$
0.86

 
$
0.88

 
$
3.36

 
(1)
Sum of quarters may not equal the total for the year due to changes in the number of shares outstanding during the year.