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16. Quarterly Financial Data (Tables)
 12 Months Ended
Dec. 31, 2016
Quarterly Financial Data [Abstract]  
Schedule of Quarterly Financial Data [Table Text Block]
 
 
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter
2016
 
 
 
 
 
 
 
 
Net sales
 
$
471.2

 
$
516.8

 
$
508.7

 
$
571.5

Gross profit
 
264.0

 
280.2

 
279.5

 
314.4

Net income (loss)
 
12.3

 
18.0

 
18.4

 
(20.6
)
Basic earnings (loss) per share
 
$
0.42

 
$
0.61

 
$
0.63

 
$
(0.70
)
Diluted earnings (loss) per share
 
$
0.42

 
$
0.61

 
$
0.62

 
$
(0.70
)
 
 
 
 
 
 
 
 
 
2015
 
 
 
 
 
 
 
 
Net sales
 
$
472.8

 
$
506.1

 
$
470.0

 
$
570.6

Gross profit
 
270.1

 
279.6

 
263.5

 
308.5

Net income
 
17.8

 
28.4

 
17.4

 
49.5

Basic earnings per share
 
$
0.61

 
$
0.98

 
$
0.59

 
$
1.69

Diluted earnings per share
 
$
0.61

 
$
0.97

 
$
0.59

 
$
1.68