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Income Taxes (Tables)
6 Months Ended
Jun. 30, 2015
Income Tax Disclosure [Abstract]  
Reconciliation between the U.S. federal statutory tax rate and effective tax rate
A reconciliation between the U.S. federal statutory tax rate and our effective tax rate is summarized as follows:
 
For the Three Months
Ended June 30,
 
For the Six Months
Ended June 30,
 
2015
 
2014
 
2015
 
2014
Statutory rate
35.0
 %
 
35.0
 %
 
35.0
 %
 
35.0
 %
State taxes
0.4

 
1.1

 

 
1.1

Taxes on foreign earnings
(11.1
)
 
(8.7
)
 
(9.8
)
 
(8.5
)
Credits and net operating loss utilization
(0.7
)
 
(0.7
)
 
(0.7
)
 
(0.9
)
Purchased intangible assets
1.1

 
1.2

 
1.0

 
1.3

Manufacturing deduction
(2.1
)
 
(1.7
)
 
(1.8
)
 
(1.8
)
Other permanent items
0.9

 
0.4

 
0.7

 
0.4

Other
0.4

 
0.4

 
0.3

 
0.3

Effective tax rate
23.9
 %
 
27.0
 %
 
24.7
 %
 
26.9
 %