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Income Taxes (Tables)
 9 Months Ended
Sep. 30, 2014
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 September 30,
 
For the Nine Months
Ended September 30,
 
2014
 
2013
 
2014
 
2013
Statutory rate
35.0
 %
 
35.0
 %
 
35.0
 %
 
35.0
 %
State taxes
1.2

 
2.5

 
1.2

 
3.7

Taxes on foreign earnings
(9.3
)
 
(6.6
)
 
(8.9
)
 
(7.7
)
Credits and net operating loss utilization
(0.6
)
 
(2.2
)
 
(0.8
)
 
(3.0
)
Purchased intangible assets
0.7

 
1.9

 
1.1

 
1.6

Manufacturing deduction
(2.0
)
 
(2.5
)
 
(1.9
)
 
(8.0
)
Other permanent items
0.4

 
(0.3
)
 
0.4

 
1.0

Other
(1.2
)
 
(0.4
)
 
(0.3
)
 
(0.1
)
Effective tax rate
24.2
 %
 
27.4
 %
 
25.8
 %
 
22.5
 %